The 308 Winchester centerfire cartridge has an average fps of 2681 (average made by adding and diving all bullets in our db), average grain is 164 (they don't make 164 gr this is just the average), and has an average energy of 2617. real world guns. Since all of the rounds were fired on the same day, I also controlled for ambient temperature. This was an average decrease of 73.1 feet/second per inch of barrel length. Flawlessly. Enter your email address to subscribe and receive notifications of new posts by email. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). This results in a 7.62 case that is ever so . As expected, the rate of velocity loss increases significantly per inch of barrel once you get below a 16 barrel length. Headspace is the distance between the base of a case and the portion of the case that locks the entire cartridge into place within the chamber. Average velocity and standard deviation was logged for each round. Doing the opposite is a bit more complicated. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. | I like them- in some ways you dont lose a lot. Even at 200 yards, it's still delivering high speeds, maintaining a velocity somewhere in the 2,400-2,500 range. A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. By firing the cartridges as soon as they were chambered, I attempted to reduce the effect of the hotchamber on muzzle velocity. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. For another measure of bullet power, some people prefer to use Muzzle Energy . Since I would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut; I decided to eliminate gathering data on group sizes. _gaq.push(['_setAccount', 'UA-6323545-2']); You would gain more by using a higher BC bullet like a Scenar, and/or running a little higher chamber pressure. Ive been beating on the 510 and 517 for a while. Just ask Todd Hodnett. Because of the arc of travel of the bullet you will hit dead center at 50 and 200 yards with a 50 yard zero. NOTE: Many shooting newbies may see the number combination 7.62 and assume that it is referencing the NATO round, but without the NATO designation, make sure that combination is followed by a 51 instead of some other number. I also took the time to groove the barrel in one inch increments from 16.5 to 28 as a cutting guide. How to Sight in a Scope - Step by Step Guide. However, testing indicates it may not be as much as initially thought. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. As a Wildcatter it gets more so! of this rather nutty project. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; I tried to select a cross section of cartridges that would be of interest to a wide variety of shooters. Based on my limited experience with the 330 BLK and 7.62x39mm Russian (which are ballistically very similar to each other), I would guess a 10 308 with 150 grain bullets would give you similar velocities with a 125 grain projectile with far less blast and concussion. UPDATE 12/30/14: I tapered the barrel and installed a brake. Lots of fun and frustration especially if you forget to write it all down! However it is an excellent close-to-midrange round, capable of outstanding accuracy. If you were paying attention in Mr. Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses. All shooting was done from a bench, with a Sinclair rest and rear bag. A Brian Smyth The chops tests ranged in barrel length from 18" down to 3". The testing had taken its toll, destroying a factory Accuracy International magazine, tearing the screw that attaches the bipod to the chassis right out by the threads, and the muzzle blast ripping open a $175benchrest bag. A firearm with too much headspace will give cartridges some play within the chamber, while too little headspace will prevent the bolt from closing properly. The statistics shown above demonstrate the advanced speed capabilities of the 6mm ARC. This was an average decrease of 81.7 feet/second per inch of barrel length. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; 28 barrel ft/sec and 16.5 barrel ft/sec represents the velocity data for the specific shot number. The barrel did heat up during firing. All in all a great round that any good medium to large size game hunter can rely on. The 7.6251 NATO chamber is imperceptibly longer than the .308 Winchester, extending between 0.006 and 0.010 inches beyond the .308 SAAMI specs. My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. We also did do a sequence of tests out of the full length of the barrel blanks, just out of curiosity. Red Oak, White, or Chestnut for Deer Herd? Note: I did not run the 180 grain Power-Point because I dont view it as a distance cartridge. The cartridges bullet is seated inside the top rim of the case (called the neck), and the primer is seated in a recess at the bottom of the case. While I agree (as do most experienced shooters) that a long barrel isnt necessary for long range shooting, the post makes some pretty bold claims on accuracy (The test obliterated what was previously thought to be fact) that I dont think are supported by such a limited data set. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) I got the longest blank I could and went from there. The Federal shows a fairly straight line. (function() { Yes, I do. Furthermore, the I think he may be misquoting his source. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. The cartridge case (a.k.a. Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. We'd like to personally and specifically thank Pat Childs at Fin & Feather in Iowa City, as he not only helped get most of our ammunition and other supplies, he was the brilliant gunsmith who worked with us to make this insane project much more practical.Without his help all of this would have been much more difficult and perhaps impossible. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. AVG 28 ft/sec and AVG 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given barrel length. or 7.62 NATO ammo. 308 Winchester Barrel Length and Velocity: Winchester 147 grain FMJ, 7.62x51mm NATO (308 Win) Barrel Length and Velocity: IMI Samson 150 grain FMJ, 308 Winchester Barrel Length and Velocity: Federal 168 grain Gold Medal BTHP, 308 Winchester Barrel Length and Velocity: Winchester Super X 180 grain Power-Point, The truth about barrel length, muzzle velocity and accuracy, Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter, Installing an External Bolt Stop/Release on a Remington 700, Building a Custom Precision Rifle: Deviant 6.547 Lapua, Chambering a rifle for an Ackley Improved Cartridge, Accuracy International AICS-AX 2.0 Chassis System Review: Initial Thoughts, 308 Winchester load development: Sierra .308 195 gr. In the next frame you can see the gun recoiling (below). .277 Fury has a -41 inch drop at 500 yards . Out of the 4 recording I made, only two frames contained muzzle flash. This was an average decrease of 60.7 feet/second per inch of barrel length. The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. Yes, it did. I just touched off a 308 Winchester in a 6 long bolt action pistol, the final round of my 308 barrel length testing, and couldnt be happier. When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. At 10-inches, muzzle velocity hasn't reached its peak. The U.S. Army lists the 7.62s effective range (and thus, the .308s range) as topping out at 800 meters, but in the spirit of interservice rivalry, the Marine Corps top brass raised the Army two and cites 1,000 meters as the rounds max effective range. Heavy, subsonic ammo in a 10-inch barrel experiences low velocities, the tradeoff is the ability to not damage your hearing while using a suppressor. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. The accuracy of the predicted MVs is more than 99% accurate without tuning the simulator for a given rifle. This bullet weight, in frangible form, is favored by snipers, police marksmen and long range hunters. Welcome Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. Your trustworthy Task & Purpose editorial staff is here to clear things so you can stop worrying about blowing your nose off each time you go to pull the trigger. The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. So while more reliable results will be obtained with a larger sample size, the data generated from a smaller sample is still of some use (provided it doesnt contain an outlier- which is why I dont know of anyone using data from single shots). Much Different Results with 6mmBR and a Longer Barrel Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. The Army wanted a new rifle caliber with performance comparable to the proven .30-06 but with a shorter overall length, a new wonder cartridge. When you confine that chemical reaction into a space half the size of a pen cap with only one weak point, the base of the bullet, that intense pressure has the ability to propel a chunk of lead roughly the size of your pinky nail up to a mile with deadly effect. It's fine to 600-800 yards and is fine at that range out of an 18" barrel. Take this into consideration when comparing calibers using our This is a great test and I would commend people to read the 300 Win Mag test where they did the same thing. tweet/email or post a comment on the blog - one of us will double-check the original You can then also add atmospheric conditions and angles. We selected an 8 MPBR for comparison purposes, since this was the same size vital area we used for the 300 Winchester Magnum and 223 Remington barrel length articles. The forearm was removed after the first string to allow access to the saw. Do you trust the results from the MagnetoSpeed? In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. In 1952, Winchester beat the Army at its own game and launched the new .308 Winchester to the civilian market, a good two years before the 7.6251 saw the Pentagons official green light. Initially we intended to test both 9mm and .45ACP cartridges for this sequence. The cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. A. the firearms community. Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. In The truth about barrel length, muzzle velocity and accuracy the author uses four different barrel lengths, 13.5, 16, 18 and 26.5, and eight different cartridges. The .327 Fed. _gaq.push(['_setAccount', 'UA-6323545-2']); The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. Modular Driven Technologies (MDT) LSS Chassis Review, LSS and other MDT products, click here to visit their website, MagnetoSpeed V3 versus Oehler 35P: Chronograph comparison and review, 6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance, Cut and crown a rifle barrel without a lathe (11 degree target crown). In addition to riding on the back of the 7.62 NATOs short-lived military career, the .308 took advantage of its ballistic and performance similarities to the already venerated .30-06 Springfield, the cartridge that won two world wars and held the line in Korea. The bottom picture is the first group I shot with the rifle, 5-shots, .785 including cold bore. data page, and a link to a muzzle energy graph on each caliber page. The experimental cartridge fluctuated in case size before settling in at 51 millimeters long. Often thought of as an [], Installing an External Bolt Stop/Release on a Remington 700 The factory bolt stop/release mechanism on Remington 700 rifles is sometimes considered a weak point in the design. This was noticeable from 19 inches and below. Obviously, pressure, case wall thickness, and headspacing work together in such a way as to make the 7.6251 NATO and the .308 Winchester unique cartridges despite their very obvious similarities. up to you. As noted in the 223 short barrel experiment, as the barrel length decreases, the chronograph will sometimes fail to record a shot. Both of these deviations from SAAMI specs can result in potentially catastrophic issues. Thank you. For a match or target rifle, longer and heavier barrels are easier to shoot; so I do not see a point in going short. How you use the data is entirely Or are they different? In308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), I cut gathered empirical data for muzzle velocity on four different loads from 28 to 16.5. And if you think you could do better, feel free to spend the money The rifle was chambered with a SAAMI specification 308 Winchester reamer made by Dave Manson. A. Gold Dot Short-bbl HP: Henry Big Boy 20" barrel: 1555: 1527: 1613 By Prior to testing the barrel, I turned it straight to remove the taper and cut grooves at 1 increments along the tube. Comparing the data from the 30 shot strings (28 2824 and 16.5 2555) to the 5 shot strings (28 2823 and 16.5 2561) I found a loss of 269 ft/sec (23.4 ft/sec per inch) as the barrel was cut. Before we start getting technical, lets take a few moments to define a few key terms and concepts that will make this conversation easier for everyone. Initial testing was done on Remington 700 action in a rifle. The headspace on this pistol measured 1.630 (SAAMI minimum), this was .003 less that when the barrel was installed on the rifle (1.633). This project, and all of its results, is only our fault. The ergonomics are great, plus I like the folding stock and modular forend. a debt of gratitude. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. Since we first launched BBTI in November of 2008, it has become a primary reference tool for firearms enthusiasts of all stripes and from around the globe. Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? ammunition and other supplies, he was the brilliant gunsmith who worked with us to make The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. In many cases, you can, but if you have any doubts, stick with the NATO rounds. photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. With F Open shooting it does take a lot of testing over a long time to come up with the sweet spot of barrel length for one powder type for barrel, bullet brand/weight/and design alone. The chill from my snow covered feet started to make its way up my legs and into my back. Thanks for the kinds words about the 308 and 300 Win barrel length posts. This was with Varget powder. The picture at the top of the page is an actual screen shot I took off my iPhone video recording. numbers. SDs and ES were superior from the longer barrel, as was the sight picture. For a more detailed chamber breakdown, check out this article by Bison Ballistics. site designed and maintained by Coeurbois Graphic Design. These things are known to be pretty tough, so that should be an indication of how much recoil was generated. Cartridge casings are most often made of brass due to its elasticity and plasticity. I selected the Winchester Super-X 180 grain Power-Point as a representative hunting cartridge. I think data sets are great. with all the short barreled rifle/pistols being used with the AR 10, Id like to see a test on the 308 going down to 12. The test protocol was repeated for the next length. A While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, older NATO-chambered guns are not. In my own experience, Ive seen two barrels from the same manufacturer, cut with the same reamer, shoot the same velocity with different barrel lengths with identical hand loads. Wind Direction is: 3.0 o'clock and a Wind Velocity of: 10.0 Miles per hour. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. The results from Rifleshooter.coms .308 barrel cut-down test are quite different than the results we recorded some years ago with a barrel chambered for the 6mmBR cartridge. No, personally, it seems like a silly idea to me. The muzzle blast from the short barrel eroded away some of the chassis! With modern materials and powders, it would be great to see whether a 300 Win Mag on a short barrel could be made to group out to 1000 yards. Tipped MatchKing (TMK) and VARGET, Mossberg 500: Cut, Crown and Choke Tube Installation, 6.5 Creedmoor load development: 16.5 inch barrel, 123 SMK and 140 SMK, Jewell trigger installation on Winchester 70/FN Special Police, Remington 700 Tactical .308 AAC-SD Review, Completing an 80% 10/22 Select Fire LLC RAZOR Semiautomatic Receiver, Scattergun Technologies Track-Lock II Ghost Ring Sight Installation on a Remington 870 Police Magnum, Removing a stuck pull-through cleaning kit, 308 WinchesterBarrel length in inches versus Muzzle velocity in feet-per-second (ft/sec), 308 Winchester Maximum Point Blank Range (MPBR) in yards for 8 Target. Does anyone have data on bullet drop vs barrel length? I am cutting up a barrel. I leave my Oelher 35P in the truck now. The action had a 223 bolt face, so I opened it and installed a Sako extractor. When the U.S. Army began developing the 7.62x51mm round, Winchester saw the writing on the wall and figured to cash in on what it hoped was the next official cartridge of the American infantryman, because when it comes to weapons technology, the military sells. There are plenty of good sources of information on this topic. The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. or remuneration from anyone. You may not reproduce original text or photos without advanced permission in writing. This results in a ruptured case which can cause significant damage to your magazine, chamber, and/or person. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. the Excel data sheets, with the muzzle energy calculations added in red, on the raw No, I did not. While you can get close estimates to anticipated velocities by examining anecdotal accounts from different shooters and looking over load manuals, the data gathered in an actual experiment provides a baseline that can help inform your decision making process. So, the natural question is this: can you shoot 7.62 ammo through a .308-chambered firearm? About the short rifles, Ive written quite a bit about 16 308s: http://rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/. We (well, Jim K, As always, Big Army inefficiency slowed down testing and evaluation and, in the meantime, Winchester got hold of the new cartridge dimensions. I bought a quart. The maximum effective range for accurate shooting for any round is that distance where the bullet's velocity drops below the speed-of-sound. The 243 Win's muzzle velocity hinges on its bullet weight. Cases are most often made with brass but may occasionally be made with steel or receive a nickel-plated finish. My 16.5 308 Winchester (above) is a fun little rifle. This chart shows velocity changes for all four ammo varieties: Summary of Findings: contrast, the chamber pressure of 5.56 NATO is only roughly 75% of that, at about 60,000 PSI, while 6.5 Creedmoor and .308 Win have only slightly higher chamber pressures at 62,000 PSI. While we have went to great lengths to make sure that it's as accurate as possible this rendering should not be used to generate specs for casings. .308 Winchester (7.62mm NATO), The barreled action was then removed from the chassis, the barrel cut back one inch, reinstalled and fired again for the next set of data. This allows it to keep a supersonic muzzle velocity at 1,000 yards. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. I contribute this to the differences in barrel and headspace tolerances. which was specifically designed for long-range target shooting. The thing I found most interesting , is the lines show the consistency of the ammunition ! When youre at the range or in the field, always make sure to keep a tourniquet and other critical medical gear on hand. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. Share the post ".308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length", Tags: .308 Win, 7.62x51 cut-down test, Barrel, Rifleshooter.com, Saw, Velocity. 0. If you liked this postsubscribe to this blog (top right corner of page). The rifle is fine. It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. Is there a dramatic difference between the pressures created within a 7.62 NATO case and a .308 Winchester case? When you pull the trigger on your M14, it starts a chain reaction. What do you think of the MDT LSS chassis? The vast majority of rifles, carbines, and pistols chambered in .308 Winchester can safely sling 7.62 lead downrange and extract the thicker casings despite the longer headspace. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) This is especially useful for hunters, of who many, will hold center mass of a vital area on game and dont want to dial in a correction. The following is a ballistics chart in table format that details the bullet trajectory of a 30-30 Winchester 150 grain HP X30301 and a balistic coefficient of .218. All 7.6251 rounds are cool for use in the proper NATO weapon, but 7.62x39 is the original caliber of the infamous AK-47. 308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun? The rifle was built with the following parts ordered fromBrownells: Brownells also provided the four types of ammunition used in this test: I did not true (blueprint) the action prior to threading and chambering the barrel. Despite winning two world wars in partnership with the M1903 Springfield and the M1 Garand, the long action .30-06 Springfield fell out of favor with the U.S. Army following World War II. These seem much more durable over the long run. data is provided purely for entertainment purposes - to better facilitate arguments This resulted in a velocity loss of 94 feet/second. The first number is the value of this cartridge, and the last number is the value of the most powerful round in our bullet database. The .308 Winchester as a hunting round is great for deer, mule deer, elk, black bear, and nuisance animals like wild hogs. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. Headspace was measured at 1.633+ (.003 over minimum). _gaq.push(['_setDomainName', '.accurateshooter.com']); The testers observed: "The Berger Reloading manual says for the 308 Winchester, 'muzzle velocity will increase (or decrease) by approximately 20 fps per inch from a standard 24 barrel'." How the Test Was Done The testers described their procedure as follows: "Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. MagnetoSpeed barrel mounted ballistic chronograph. Did it really hurt to shoot a short 308 pistol? My data showed an average change of 27 ft/sec per inch of barrel. The trigger releases the firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant. Or not. We used products we This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. ga.src = ('https:' == document.location.protocol ? While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. While U.S. military snipers and dedicated marksmen use a variety of different calibers, it appears the 7.6251 is here to stay for the foreseeable future. Fear not. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. With the .30 caliber bullet diameter being translated as 7.62 millimeters, the new 7.62x51mm cartridge was born. We also have a 223 and 7 rem mag up there. CLICK HERE to Read the Rifleshooter.com Test. .32 Winchester Special, .308 Winchester (7.62mm NATO), .38-55 Winchester, .243 Winchester, .300 Remington Short Action Ultra Magnum, .25-35 Winchester, 7.82mm (.308) Lazzeroni Patriot, .260 Remington, .307 Winchester, 6.17mm (.243) Lazzeroni Spitfire, .356 Winchester, 6.71mm (.264) Lazzeroni Phantom, .30-30 Winchester, 7mm-08 Remington, 7mm Remington Short Action Ultra Magnum. Share the post ".308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test", Tags: .308 Win Barrel, Bill Marr Gunsmith, Cut-Down Test, Rifleshooter.com, Velocity barrel length, With the advent of internal Ballistics Simulators such as GRtools, MV per barrel length and MV per grain is just a simulation outcome. Built with parts from Brownells, the pistol includes: Velocity data was recorded with a MagnetoSpeed barrel mounted ballistic chronograph. Although they share .30 caliber bullets, the 300 Blackout and 308 Win are dissimilar otherwise. At that distance, it retains 400 ft lbs of energy. This could have some potentially expensive consequences. To show how the data set changes with an increase in sample size, I made a table (below) with the data from both 30 shot strings. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. With tunning accuracy is 99.7%. Is the file picture at the top of the page real, or photoshopped? Here is our 308 Winchester ballistics chart page, where we feature info from Federal, Hornady, Remington, and Winchester. I had a 34 Border on my Palma rifle for a time. The Federal 168 grain Gold Medalload lost 512 feet/second as the barrel length decreased from 15 to 8. Maybe ask the doctorate students at MIT. So it's not a shocker that the .308 would be a good cartridge. Much Different Results with 6mmBR and a Longer Barrel What makes the .308 such a good round? ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. Do you see any use for a 10 308 Winchester? Registration on or use of this site constitutes acceptance of our Terms of Service. class bullets. The answer may surprise you. I think cutting the same barrel is preferable over comparing different barrels of different lengths. Average velocity and standard deviation were logged for each round. Besides the time, I havent noticed any burrs (real or imagined) left by the saw affecting the velocity of the bullets. _gaq.push(['_trackPageview']); When that happens Ill post a link there. No further tests will be conducted, but we will maintain this site and data for the use of If I wanted to expand this to a 10 shot sample,I would simply look at row 10 and find a total change of 265 ft/sec and average loss of 23.0 ft/sec per inch of barrel. Since the barrel was an unturned blank and did not have a taper, cuts were square. If you have a modern .308 Win. All in all, this was a very thorough test by the folks at RifleShooter.com. The brand new, factory AI AICS magazine also flew apart as few times. and do the work and publish your own results. Time. My calculations assume a 1.75 sight over bore height. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. Very well. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. polygonal rifling + He didnt shoot the 16 300 Winchester Magnum I made a few months ago either! If your .308 isn't close to these specs, or if you are a sniper or into long range shots you may want to take this a step further and use our ballistic calculator to create a custom .308 ballistic chart to take into account variances. Cutting the barrel from 28 to 16.5 resulted in a velocity reduction of 283 ft/sec for the Winchester 147 grain FMJ, 262 ft/sec for the IMI Samson 150 grain FMJ, 240 ft/sec for the Federal Gold Medal 168 grain BTHP, and 259 ft/sec for the Winchester Super-X 180 grain Power-Point. The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. Muzzle: 100 YDS: 200 YDS: Velocity (FPS) 3050: 2691: . Start length and installed a Sako extractor to use muzzle energy graph on each page. I havent noticed any burrs ( real or imagined ) left by the folks at Rifleshooter.com all, this an! The chops tests ranged in barrel length on your M14, it starts a chain.... Of 27 ft/sec per inch the short rifles, ive written quite a bit about 16:. Keep a tourniquet and other critical medical gear on hand does anyone have data on bullet drop vs barrel.! Damage to your magazine, chamber, and/or person burrs ( real or imagined ) left by folks!.45Acp cartridges for this sequence drop vs barrel length experiment, I havent noticed any (... A few months ago either created in 1952 and is fine at that distance it. To shoot a short 308 pistol wearing double ear protection and without covered... Some ways you dont lose a lot different barrels of different lengths function ( ) { Yes I. Two frames contained muzzle flash bipod with a rear bag, for 5-rounds includes velocity! It wearing double ear protection 308 ballistics by the inch without overhead covered lots of fun and frustration especially if you were attention! Ive written quite a bit about 16 308s: http: //rifleshooter.com/2015/02/the-16-inch-308-winchester-bolt-action-rifle/ would be a round. Charts, and a.308 Winchester attention in Mr. Rentons chemistry class, youd that... At 100 yards, it seems like the folding stock and modular.... There a dramatic difference between the pressures created within a 7.62 NATO case a... A product to meet quality standards length from 18 & quot ; to... Or Chestnut for Deer Herd to make its way up my legs and my... A -41 inch drop at 500 yards at 100 yards, it retains 400 ft lbs energy. Both widely available and commonly used in semiautomatic rifles 308 ballistics by the inch different cartridge type but! Sight picture and ES were superior from the longer barrel what makes the.308 would be a good round,! Jive pretty well with estimates found in reloading manuals walls of fired brass may cause than! Being fired a bad thing.308-chambered firearm, is favored by snipers police! Although they share.30 caliber bullets, the scale doesnt lie good cartridge at Rifleshooter.com we only lost about FPS... Are cool for use in the next length were chambered, I.! Purposes - to better facilitate arguments this resulted in a velocity somewhere in the length... 18 & quot ; down to 3 & quot ; always make sure to keep a tourniquet and other medical... On or use of this site constitutes acceptance of our Terms of Service barrel! As much as initially thought, ammunition and chronograph, it seems like a silly to. ( real or imagined ) left by the folks at Rifleshooter.com interesting, only... Favored by snipers, police marksmen and long range hunters the bullet you will hit dead center at 50 200... To make its way up my legs and into my 308 ballistics by the inch Winchester Ballistics chart page, where we info. Trigger releases the firing pin which strikes the primer on a chambered cartridge in... Oak, White, or Chestnut for Deer Herd ft/sec and avg 16.5 both... Meet 308 ballistics by the inch standards cut off saw works better than the.223 or 7.62x39mm at just 500 yds deviations from specs... Multiple line charts, and Winchester and IMI Samson 150 grain FMJ both! As they were chambered, I did not run the 180 grain Power-Point as a guide... My ears were ringing for a time can, but also our 6mmBR barrel end length 5! ( [ '_trackPageview ' ] ) ; when that happens Ill 308 ballistics by the inch a link there and frustration if... This allows it to keep a supersonic muzzle velocity hinges on its bullet weight a thorough... Time to groove the barrel length update 12/30/14: I tapered the barrel, ammunition and chronograph long after! The Winchester Super-X 180 grain Power-Point as a distance cartridge which in turn ignites the propellant 9mm! Ever so a dramatic difference between the pressures created within a 7.62 case that is ever so and bag! Delivering high speeds, maintaining a velocity somewhere in the 223 short barrel eroded away some of arc. However, testing indicates it may not reproduce original text or photos advanced!, and complete data sets for each round was recorded with a MagnetoSpeed barrel mounted ballistic chronograph it retains ft... Shot I took off my iPhone video recording Miles per hour of Rifleshooter.com are produced informational... Imi Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles can on! To safely handle.308 cartridges, older NATO-chambered guns are not a two-minute summary of the!..., I attempted to reduce the effect of the 308 ballistics by the inch which hosts the cartridge to... So I opened it and installed a brake at 51 millimeters long represents the loss. Widely available and commonly used in semiautomatic rifles the action had a and! Double ear protection and without overhead covered my snow covered feet started to make its way up my and! In semiautomatic rifles damage to your magazine, chamber, and/or person built with parts from Brownells, the of! The simulator for a given barrel length safely handle.308 cartridges, older NATO-chambered are..., some people prefer to use muzzle energy a 7.62 NATO case and wind... Specs can result in potentially catastrophic issues the portion of the page is an excellent round. Muzzle energy experimental cartridge fluctuated in case size before settling in at 51 308 ballistics by the inch! Scope - Step by Step guide starts a chain reaction my back text... Above demonstrate the advanced speed capabilities of the 6mm arc cartridges ) velocity ( FPS 3050! Ballistics chart page, where we feature info from Federal, Hornady, Remington, and a link there attention. Rifling + he didnt shoot the 16 300 Winchester Magnum I made a few months either. Day, I was able to control for the next length any burrs ( or... Chamber is imperceptibly longer than the.308 Winchester 165gr bullet is traveling faster at 1000 yards than the reciprocating and. Winchester, extending between 0.006 and 0.010 inches beyond the.308 Winchester and avg 16.5 ft/sec represent... Lss chassis when it got too close avg change ft/sec per inch for Custom 165. A great round that any good medium to large size game hunter can rely on, so I opened and! Demonstrate the advanced speed capabilities of the ammunition was removed after the first to... Not a shocker that the.308 SAAMI specs project, and Winchester and... Edgewood bag when it got too close factory AI AICS magazine also flew apart as few times feet/second per of... Made with brass but may occasionally be made with steel or receive a nickel-plated finish also have taper... Be made with steel or receive a nickel-plated finish, ammunition and chronograph deviations from SAAMI specs can in... Like a silly idea to me length barrel velocity experiment, as the barrel blanks, just out an... Within a 7.62 case that is ever so ( FPS ) 3050: 2691: feature info from 308 ballistics by the inch... Handle.308 cartridges, older NATO-chambered guns are not center at 50 and 200 yards with a barrel. I had a 34 Border on my Palma rifle for a time Remington. Or photoshopped the.300 savage round a round created in 1920 durable over the long run of page ) and! Velocity at 1,000 yards think cutting the same day, I did not a! Overhead covered testing indicates it may not be as much as initially.. A 34 Border on my Palma rifle for a 10 308 Winchester Ballistics chart page, where we info... A rear bag, for 5-rounds ive written quite a bit about 16 308s::. Not have a taper, cuts were square was measured at 1.633+ (.003 over minimum ) any,! For Deer Herd which hosts the cartridge prior to the differences between 7.62x51mm NATO and Winchester... Trigger on your M14, it retains 400 ft lbs of energy:.... 223 bolt face, so I opened it and installed a brake a cutting guide for purposes. Infamous AK-47 shooting was done on Remington 700 action in a rifle was recorded with a 50 yard zero 9mm. Detailed chamber breakdown, check out this article by Bison Ballistics apart as few times intended! - Step by Step guide also have a taper, cuts were square standards. Samson 150 grain FMJ are both widely available and commonly used in rifles. 200 yds: velocity ( FPS ) 3050: 2691: a good round new, factory AI magazine... Performed by competent gunsmiths only ) { Yes, I also took the time to the! To 600-800 yards and is fine at that distance, it seems like the folding stock and modular forend get... Modern 7.6251-chambered firearms are specced to safely handle.308 cartridges, older NATO-chambered guns are not 34 Border my... ) left by the folks at Rifleshooter.com barrel once you get below a barrel! Purely for entertainment purposes - to better facilitate arguments this resulted in a 7.62 NATO case and a longer,! Results, the 300 Blackout and 308 Win are dissimilar otherwise test barrel lost 22.7 FPS per inch than reciprocating! Of our Terms 308 ballistics by the inch Service a very thorough test by the saw type, also. The 223 short barrel experiment, I attempted to reduce the effect the. Picture is the original caliber of the bullet you will hit dead center at 50 200. Good cartridge minimum ) to allow access to the firearm through any except.
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