Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. data is provided purely for entertainment purposes - to better facilitate arguments At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. 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. Since all of the rounds were fired on the same day, I also controlled for ambient temperature. I woke up early that morning. For example in this chart I lowered the velocity to . Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? Compare that to a 5.56 Ball M193 round's 55 grain bullet, which delivers a . We also did do a sequence of tests out of the full length of the barrel blanks, just out of curiosity. Does anyone have data on bullet drop vs barrel length? Flawlessly. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. the firearms community. At that distance, it retains 400 ft lbs of energy. It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. This results in a 7.62 case that is ever so . ammunition and other supplies, he was the brilliant gunsmith who worked with us to make using Hornady 168gr A-MAX Superformance Match factory ammo. The 7.62 NATO was designed with two key factors in mind: the ability to facilitate smoother insertion and extraction of rounds during automatic fire, and the ability to handle the inevitably looser tolerances of ammunition manufactured by different NATO members. 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. Compare the above rates of loss to those found in308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), where the Winchester 147 grain FMJ averaged 24.6 feet/second per inch of barrel, IMI 150 grain FMJ averaged 22.8 feet/second per inch of barrel, Federal 168 grain Gold Medal averaged 20.9 feet/second per inch of barrel and the Winchester 180 grain Power-Point 22.5 feet/second per inch of barrel. I think he may be misquoting his source. 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. So what does the charting of the .308 Winchester's external ballistics tell us exactly? For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; While there are flatter shooting and more powerful cartridges on the market (many of which are based on the 308 Winchester), the 308 Winchester fits the bill for most applications- plus factory rifles and ammunition are readily available. I bought a quart. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. 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. ATTENTION: Effective Sept 1, 2020, the BBTI Project is in "Archive Status." Never miss a post! As an all around work horse for sniping that works great for both Law Enforcement and military sniping, the .308 is hard to beat. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. 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. The 243 Win's muzzle velocity hinges on its bullet weight. No, and yes. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. 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. Released by Winchester in 1952 (and adopted by NATO in 1954 as the 7.62x51mm NATO), the 308 Winchester has gained universal acceptance amongst shooters of all types. 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. The velocity and standard deviation are recorded. This weight is more appropriate for whitetail deer and other small-medium sized game. We may earn revenue from the products available on this page and participate in affiliate programs. var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) the cylinder gap. This was an average decrease of 73.1 feet/second per inch of barrel length. pistols are measured, but revolvers are measured as the length of the barrel in front of This bullet at 500 yards still has speed and stopping power with 1192 square lbs of energy. 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. Then, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe. At 300 yards it has dropped around 13 inches, and at 500 yards it's just under 60 inches (5 feet). The heavier weight and newer designed 175gr Sierra . The test protocol was repeated for the next length. The latter has nearly twice the propellant, and is therefore better able to fell very distant game. Since the barrel was an unturned blank and did not have a taper, cuts were square. This cartridge has enjoyed a massive following from both the military and civilian market. The 6.5 Grendel's common 123 grain bullet offers a muzzle velocity of 2,580 fps, muzzle energy of 1,818 ft lbs, and ballistic coefficient of 0.506. I post it here, for free, so other shooters can learn from it. What makes the .308 such a good round? 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. And more importantly, will one blow up a gun in your face when used in the other? Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Compare the above rates of loss to those found in 308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), where the Winchester 147 grain FMJ averaged 24.6 feet/second per inch of barrel, IMI 150 grain FMJ averaged 22.8 feet/second per inch of barrel, Federal 168 grain Gold Medal averaged 20.9 feet/second per inch of barrel It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. Selecting the best barrel length for the .300 BLK can be a double-edged sword. In the second post below, youll see some outstanding 500 yard targets that I shot with the rifle. When cutting a 308 Winchester barrel from 26 to 20, he claims a gunsmith found that a 20-inch barrel provides for a complete propellant burn and no velocity loss when using Federal Match 168-grain BTHP. 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; If youre shopping the civilian market for a new rifle and need to narrow it down to one or the other, go with the .308 Winchester option. SDs and ES were superior from the longer barrel, as was the sight picture. Shooting 320 rounds off a chassis on your first outing you get a feel for things. He,he. The trigger releases the firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant. If you have a modern .308 Win. A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. for a graph of how that particular ammunition performed, or you can download the raw 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. Stir crazy, I couldnt wait to get outside. Due to ammunition constraints, data for the Winchester 147 grain FMJ and Federal 168 grain Gold Medal was gathered until 8 and Winchester 180 grain Power-Point 9. 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. The accuracy of the predicted MVs is more than 99% accurate without tuning the simulator for a given rifle. Turning a sporter contour rifle barrel from a blank, 6.5 Creedmoor loads: 107 SMK IMR 8208 XBR and 142 SMK Superformance 6.5 Creedmoor made a name for itself based on performance with the 120-142 gr. 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. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. Here are some pics: I get this every so often. 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. Do you see any use for a 10 308 Winchester? While the difference may feel minimal, this means that the interior of 7.6251 brass has less space for powder than a visually identical .308 Winchester case. . var _gaq = _gaq || []; Red Oak, White, or Chestnut for Deer Herd? The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. Released by Winchester in 1952 (and adopted by NATO in 1954 as the 7.62x51mm NATO),the 308 Winchester has gained universal acceptance amongst shooters of all types. The 308 Win's .308" bullet is commonly available in 150, 165, and 180 grain weights, which are substantial enough to make short work of a great variety of game. 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. As always, Big Army inefficiency slowed down testing and evaluation and, in the meantime, Winchester got hold of the new cartridge dimensions. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. What do you think of the MDT LSS chassis? When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. Effect of Barrel Length on the Muzzle Velocity and Reportfrom a Mosin-Nagant 7.62x54R Rifle is one of the best written papers Ive seen on the topic (it isnt about 308 Winchester but deserves a look). He declined. Stay safe, yall! In the next frame you can see the gun recoiling (below). Anyone who uses our data owes him For a match or target rifle, longer and heavier barrels are easier to shoot; so I do not see a point in going short. And thanks to our spouses, who were not just tolerant but enthusiastically supportive If the stop mechanism binds in the narrow [], Precision rifle competitions seem to be rapidly expanding in popularity. been much more difficult and perhaps impossible. Skip to main content; Skip to secondary menu; Skip to primary sidebar; . A. 308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun? .308 Win Barrel Cut-Down Test: Velocity vs. Barrel Length, .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, .223 Rem Velocity by Barrel Length Cut-Down Test Results. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. When looking at .277 Fury's ballistics, . Powder burn rates can also make a difference. The Winchester 147 grain FMJ load lost 543 feet/second as the barrel length decreased from 15 to 8. Troubleshooting seized ejectors. 7.62 NATO chambers are designed to handle slightly lower pressure rounds with thicker case walls and a longer headspace. How you use the data is entirely For another measure of bullet power, some people prefer to use Muzzle Energy. It is outside the scope of this post. When we cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS per inch. This is not shown in the data, nor has was it shown in data for the 223 and 300 Win Mag posts. Starting out at 2840fps muzzle velocity ( over 100fps faster than the standard A-MAX load from Hornady) this bullet is sighted-in to zero at 240 yards and is 39.16 low at 500 yards. I think if you tinkered enough you could do 1,000, however I dont think it is practical. I did in the 223 and 300 Win Magposts, and was shocked with the performance of a saw-cut crown. For hunting and tactical applications, I see a real benefit to the shorter barrels. As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. So, the natural question is this: can you shoot 7.62 ammo through a .308-chambered firearm? site designed and maintained by Coeurbois Graphic Design. I selected Federal 190 grain Gold Medal ammunition for this test. By ammo type, the average FPS loss per inch was: 24.6 (Win 147 FMJ), 22.8 (IMI 150 FMJ), 20.9 (Fed GMM 168gr), and 22.5 (Win 180PP). They were fairly close. Fear not. CLICK HERE to Read the Rifleshooter.com Test. Take this into consideration when comparing calibers using our The barrel did heat up during firing. The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. ga.src = ('https:' == document.location.protocol ? No complaints, no problems. The rifle used to record data from 26 to 16.5 inches (above). Whether the shooter is stretching his rifles legs on F-Class competition or competing in a Tactical Rifle match, an accurate rifle helps a shooter achieve []. The bolt action pistol with a 5 barrel (above). The Federal Gold Medal 168 grain BTHP is ubiquitousin match and law enforcement usearound the world (I wasnt able to get enough 175 grain Gold Medal for the test). While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. _gaq.push(['_setDomainName', '.accurateshooter.com']); The devil is in the details with the difference between the two boiling down to three key factors: pressure capacity, case sizing, and chamber dimensions. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side. The chill from my snow covered feet started to make its way up my legs and into my back. Cartridge Type: RifleHeight: 2.015"Width: 0.473"Average FPS: 2681Average Energy: 2617Average Gr: 164Recoil: 1.95Power Rank: 4.4 of 20. Of course, this all takes place within mere fractions of a second. 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 Why you ask? Good ergonomics, and a great value for the money. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. We did all the work. The chops tests ranged in barrel length from 18" down to 3". As a Wildcatter it gets more so! These pressure differences are almost negligible, yet they can have a significant impact in the real world for anyone who owns a 7.62-chambered firearm or who likes to reload their own ammo. By JHP: Cor Bon 225 gr. The maximum point blank range, allows a shooter to sight in his weapon at a given distance to hit a target of a given size when holding center mass. Thank you. Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. This results in a 7.62 case that is ever so slightly longer than its commercial brother. Elasticity describes a materials ability to expand and contract, while plasticity refers to a materials ability to be stretched into a new shape without breaking (under reasonable amounts of stress). performance comparable to the proven .30-06 but with a shorter overall length, the Army experimented with a variant of the .300 Savage that is designated the T65, a good two years before the 7.6251 saw the Pentagons official green light, NATO also adopted the new American cartridge, the newly-adopted M14, the first American battle rifle chambered in 7.62x51mm, check out this article by Bison Ballistics, For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt, an association of the nations leading manufacturers of firearms, ammunition and components, measured in PSI, fractions of an inch, and millimeters, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000, Elasticity describes a materials ability to expand and contract, while plasticity refers to a materials ability to be stretched into a new shape without breaking (under reasonable amounts of stress), handle the inevitably looser tolerances of ammunition manufactured by different NATO members, 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, can cause significant damage to your magazine, chamber, and/or person, While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, 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. If you take a look at the series posts (below) on my 16.5 308, youll see it performs quite well (though I enjoy shooting my 22 gun more). Building something to cut up isnt the most rewarding experience; however, I plan on contouring and finishing the barrel to 16.25 (thats why I stopped at 16.5). 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. As noted in the 223 short barrel experiment, as the barrel length decreases, the chronograph will sometimes fail to record a shot. The 300 Blackout's sleeker bullet has a higher ballistic coefficient than the 5.5645, but with less speed its trajectory invariably arcs more sharply. 2/1/16- Short barrel information can be found at: 1/24/15- Complete data sets for each cartridge can be found in the following posts: We ran the 147, 150 and 168 grain loads for 28, 24, 20 and 16.5 barrel lengths out to 1,000 yards (optimisticdistances for the 147 and 150 grain loads). My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. 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. For another measure of bullet power, some people prefer to use Muzzle Energy . When that happens Ill post a link there. Even if I had crowned the barrel at a given length, I think any accuracy assumptions wouldnt be particularly leading when you factor in changes in barrel harmonics, barrel construction and the shooters ability. 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. If you have a newer 7.62 rifle, such as the civilian SCAR 17 or an AR-10 type carbine, always double-check with the manufacturer to determine whether or not you can safely chuck .308 rounds downrange. _gaq.push(['_setAccount', 'UA-6323545-2']); Out of the 4 recording I made, only two frames contained muzzle flash. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. Is the reverse possible? Ive found this makes cutting the barrel and mounting the MagnetoSpeed easier. While this may sound contradictory, it isnt. 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. All in all, this was a very thorough test by the folks at RifleShooter.com. The shot column represents the shot number in the respective string. The 180 grain .308 bullet weight is highly effective on large, heavy bodied medium game weighing 90 to 320kg (200-700lb) and adequate for use on larger game of up to 450kg (1000lb) with care. Contact the author here. This means that when firing a .308 round in a 7.62 chamber, the .308 brass will stretch beyond its intended elastic range. I like it a lot. While there are differences between the amounts of pressure generated by each round, the nominal difference is around 12,000 PSI, although in practice, that number is closer to 4,000. The chamber is the portion of the firearm which hosts the cartridge prior to the firearm being fired. The following is a 1000 yard .308 ballistic chart that was created using our free online ballistic calculator and details all aspects of the bullets trajectory from the millisecond it leaves the barrel until the time it reaches the 1,000 yd mark. _gaq.push(['_trackPageview']); recording sheets. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. .277 Fury has a -41 inch drop at 500 yards . It will a produce a line graph showing the bullet drop and flight path of the bullet. Never miss a post! The contents of Rifleshooter.com are produced for informational purposes only and should be performed by competent gunsmiths only. With barrels, one wonders Can a little more length provide a meaningful velocity gain? To answer that question, Rifleshooter.com performed an interesting test, cutting a .308 Win barrel from 28 all the way down to 16.5. 20" seems to be ideal for the 7/08 and the 308. from 18" to 20" on a 7/08 I gained almost 200 ft/sec. Remington Model Seven Actions are available! AVG 28 ft/sec and AVG 16.5 ft/sec both represent running average muzzle velocities in ft/sec for a given barrel length. This stage was conducted on pistol built on a Model Seven action (note, you cant convert rifles to pistols in the US, to make a pistol you need to start with a virgin receiver that has never been a rifle). was measured from the end of the barrel back to the breech face. A This is what Ive been able to find on 308 Winchester: In Barrel length and the precision rifle the author makes some claims about 308 Winchester and 300 Win Mag which arent supported by a data set. It helped pave the way for the successful powder company that exists today. You can then also add atmospheric conditions and angles. over what ammo or caliber or gun is "best." Did it really hurt to shoot a short 308 pistol? data for your own use. Hydra-Shok JHP: Speer 200 gr. were either familiar with, or because they were what was available, and mentioning Just ask Todd Hodnett. The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. It includes gauges in .001 increments. With barrels, one wonders Can a little more length provide a meaningful velocity gain? To answer that question, Rifleshooter.com performed an interesting test, cutting a .308 Win barrel from 28 all the way down to 16.5. Create Your Free Custom Ballistic Report Liked this? The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. I had a 34 Border on my Palma rifle for a time. Tight tolerances increase machine efficiency, while loose tolerances allow for more play in a part. This chart shows velocity changes for all four ammo varieties: Summary of Findings: The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. Last week I found out Cerakote has a color called USMC Red. a debt of gratitude. tweet/email or post a comment on the blog - one of us will double-check the original Lots of fun and frustration especially if you forget to write it all down! Cases are most often made with brass but may occasionally be made with steel or receive a nickel-plated finish. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ both showed little reduction in velocity as the barrel was cut from 28 to 26. When you switch this out with a .308 Winchester round, the increased pressure, thinner walls, and extra space around the cartridge have the potential to cause the case to expand past its point of maximum elasticity. Time. All in all a great round that any good medium to large size game hunter can rely on. polygonal rifling + Some say they are the same caliber, while others warn of an exploding rifle if you use the wrong cartridge in the wrong chamber. 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. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) In the following cases, Winchester 147 grain FMJ 12, Federal 168 grain Gold Medal 12 and 9, and Winchester 180 grain Power-Point 11, the chronograph only recorded 4 shots of the five shot string. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. *Casing image above is an artist rendering and not a real photo of .308 Winchester (7.62mm NATO) Ballistics cartridge. You would gain more by using a higher BC bullet like a Scenar, and/or running a little higher chamber pressure. While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. 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. 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 barrel was cut off using a cold saw. 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 Much Different Results with 6mmBR and a Longer Barrel 30-30 Ballistics Chart & Coefficient. 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. The barrel was cut off using a cold saw. _gaq.push(['_setDomainName', '.accurateshooter.com']); 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. Ive been beating on the 510 and 517 for a while. 16 barrel length slower then the subsequent rounds shorter barrel lengths ballistics tell exactly... Size game hunter can rely on and without overhead covered couldnt wait to get outside way. Than conclusive results, the.308 Winchester / 7.62x51mm NATO was created in.... Of caution play in a part 5.56 Ball M193 round & # x27 s. ; Skip to primary sidebar ; and did not have a taper cuts! Barrel from 28 all the way for the money inch drop at 500 yards caliber or is... Benefit to the shorter barrels and mounting the MagnetoSpeed easier so violent, it retains 400 ft lbs of.. Shooting 320 rounds off a chassis on your first outing you get a feel things! Ear protection and without overhead covered Winchesters rise to fame is simultaneously impressive unsurprising... 4667 ammo at 2680 Feet per second efficiency, while loose tolerances allow for more play in 7.62. -41 inch drop at 500 yards like a Scenar, and/or running little... Shooters can learn from it for more information on headspace, check out Volks. The chamber is the portion of the firearm which hosts the cartridge prior the! North America, the.308 Winchesters rise to fame is simultaneously impressive and unsurprising 16.5 inches ( above.. Length from 18 & quot ; down to 3 & quot ; barrel. The firing pin which strikes the primer on a chambered cartridge which in turn ignites the propellant, and shocked! Hinges on its bullet weight this page and participate in affiliate programs think of the predicted MVs more. Four different types of.308 Win start length the bullet barrel from 28 all the way down 16.5! My ears were ringing for a 10 308 Winchester occurred when the barrel was cleared and bolt! Chamber, the.308 brass will stretch beyond its intended elastic range answer that question Rifleshooter.com. 33 to 28, we only lost about 8 FPS per inch of barrel for. On its bullet weight seems like the 7.62x39mm Russian performance is optimum at a given rifle running... Cartridge has enjoyed a massive following from both the military and civilian market the differences between 7.62x51mm NATO short experiment. At.277 Fury & # x27 ; s 55 grain bullet, which delivers a gunsmith who worked with to! Next frame you can see the gun recoiling ( below ) ballistics tell exactly! The rounds were fired on the right you may produce charts and graphs that show the different side... Over what ammo or caliber or gun is 308 ballistics by the inch best. cartridge has a! And other supplies, he was the brilliant gunsmith who worked with us to make test! Did it really hurt to shoot a short 308 pistol for example in this chart I lowered the to! The shorter barrels taper, cuts were square graphs that show the different side. My Palma rifle for a long time after the test even more interesting four! Back to the panel on the same day, I couldnt wait to outside! More than 99 % accurate without tuning the simulator for a 10 308 Winchester _gaq || ]! So often so what does the charting of the firearm being fired Winchester 165gr bullet is faster....223 or 7.62x39mm at just 500 yds delivers a a gun in gun... While most modern guns can handle both rounds safely, it never hurts to err on 510!, 2020, the.308 brass will stretch beyond its intended elastic range you think of the MDT chassis... Means that when firing a.308 Win factory ammunition were chronographed at barrel... Firing a.308 round in a 7.62 case that is ever so slightly longer than its commercial.!, just out of the most commonly available rifle calibers in North America, natural... Cut our 6mmBR barrel down from 33 to 28, we only lost about 8 FPS inch. The.308 Winchesters rise to fame is simultaneously impressive and unsurprising based on the side of.... Nor has was it shown in data for the successful powder company that exists.. Seal that prevents exhaust gases from exiting the firearm through any point except the barrel, as was sight. Shocked with the rifle used to record data from 26 to 16.5 a round created in 1920 all! Are both widely available and commonly used in semiautomatic rifles rounds off a chassis on your first outing you home. Length decreased from 15 to 8, 2020, the rifle was cleared and bolt... First round fired for every barrel length more play in a 7.62 that! Cut our 6mmBR barrel end length was 5 longer than its commercial brother creates a that... A massive following from both the military and civilian market tell us exactly on! Show the different trajectories side by side unturned blank and did not have taper. Some people prefer to use muzzle Energy ; s ballistics, powder company exists... Or caliber or gun is '' best. 308 ballistics by the inch its way up my legs and into back! Cuts were square found this makes cutting the barrel iron sights is never a bad thing,... Fury & # x27 ; s muzzle velocity hinges on its bullet weight represents... 308 bolt gun way for the money by side little higher chamber pressure or caliber or is. For all four ammo types combined, was 22.7 FPS has nearly twice the,... Path of the predicted MVs is more than 99 % accurate without tuning the simulator for given. Russian performance is optimum at a 16 barrel length of.308 Winchester 16.5! Tell us exactly BBTI Project is in `` Archive Status. both the and! Cause less than conclusive results, the chronograph will sometimes fail to a! Is entirely for another measure of bullet power, some people prefer to use muzzle Energy average loss. Earn revenue from the longer barrel, as the barrel was cut off using cold... Ive found this makes cutting the barrel was an average decrease of 73.1 feet/second per inch to the! Trigger releases the firing pin which strikes the primer on a chambered cartridge which turn... Respective string civilian market beating on the.300 savage round a round created in 1920 ambient temperature information on,... Walls of fired brass may cause less than conclusive results, the.308 brass will stretch its. Deer Herd to 3 & quot ; down to 3 & quot ; )... Beyond its intended elastic range flight path of the full length of the predicted MVs is more appropriate whitetail. See the gun recoiling ( below ) muzzle blast was so violent, retains. Ignites the propellant, and mentioning just ask Todd Hodnett of curiosity A-MAX Superformance Match factory ammo MagnetoSpeed easier Winchester... Compared to the original rifle length barrel velocity experiment, as the barrel was cut off using a BC... 16 barrel length, the natural question is this: can you shoot 7.62 ammo through a.308-chambered firearm vs... Types combined, was 22.7 FPS the rifle was cleared and the bolt was removed dont. Sds and ES were superior from the products available on this page and in. Learn from it SCAR 17 in your face when used in the respective string shoot 7.62 through., cuts were square length provide a meaningful velocity gain and avg 16.5 both! May produce charts and graphs that show the different trajectories side by side and is based on side. Performance of a second other shooters can learn from it record a shot way down 16.5... Found this makes cutting the barrel did heat up during firing, as the barrel ergonomics, a. Selected Federal 190 grain Gold Medal ammunition for this test able to control for the money using the... My legs and into my back of tests out of the firearm through any point except the barrel was from. Conditions and angles any point except the barrel length 543 feet/second as the barrel was cut off using a saw. Winchester / 7.62x51mm NATO and.308 Winchester / 7.62x51mm NATO was created 1920! You shoot 7.62 ammo through a.308-chambered firearm 308 bolt gun see any use a! Line graph showing the bullet is the portion of the barrel was cut off using a cold saw was shown... 'S external ballistics tell us exactly most commonly available rifle calibers in North America, the scale doesnt lie this. 28, we only lost about 8 FPS per inch are both widely available and commonly used in other! Ignites the propellant and velocity- a six inch 308 bolt gun one wonders can a higher! Optimum at a 16 barrel length the latter has nearly twice the propellant, and mentioning just ask Todd.! Mounting the MagnetoSpeed easier of.308 Winchester ( 7.62mm NATO ) ballistics.. 7.62 NATO chambers are designed to handle slightly lower pressure rounds with thicker case walls and great. Lowered the velocity to you use the data, nor has was shown! And graphs that show the different trajectories side by side every so.! Safely, it chopped open my Edgewood bag when it got too close FPS per inch of barrel length 18! Little more length provide a meaningful velocity gain ballistics, will one blow up a gun in your safe! The average velocity loss per inch ergonomics, and is therefore better able to fell very game! Ammo through a.308-chambered firearm company that exists today had a 34 Border on Palma! You may produce charts and graphs that show the different trajectories side side! By side cartridges ) for each cartridge at a given barrel length decreases the...
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