308 ballistics by the inch

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. The IMI 150 grain FMJ 7.62x51mm NATOload lost 735 feet/second as the barrel length decreased from 15 to 6. The short barrels gas out pretty quickly. Nearly every target shooter had his teeth cut on a 308 Winchester. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. the firearms community. The barrel was cut off using a cold saw. Prior to testing the barrel, I turned it straight to remove the taper and cut grooves at 1 increments along the tube. | Did it really hurt to shoot a short 308 pistol? Good ergonomics, and a great value for the money. 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. Re: 308 18" barrel Velocity 168 GMM is accurate but does not have the best ballistics available for extended range. One note: in every case with the T/C Encore the length of the barrel 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. 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. Note: I did not run the 180 grain Power-Point because I dont view it as a distance cartridge. This was an average decrease of 73.1 feet/second per inch of barrel length. 7.62x51mm) and .308 Winchester the same thing? Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Headspace was measured at 1.633+ (.003 over minimum). The answer may surprise you. What do you think of the MDT LSS chassis? Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) 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. using Hornady 168gr A-MAX Superformance Match factory ammo. You may not reproduce original text or photos without advanced permission in writing. Here are some pics: I get this every so often. Why you ask? I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. The short answers to these questions are yes and maybe. I think the value of this data is worth the time, effort and expense. 308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun? In many cases, you can, but if you have any doubts, stick with the NATO rounds. 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. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. Of course, this all takes place within mere fractions of a second. DPX: Federal 240 gr. Cases are most often made with brass but may occasionally be made with steel or receive a nickel-plated finish. Yes, I did for the 223 post. Would be interesting to find out. The IMI Samson 150 grain FMJ is a 7.62x51mm NATO spec cartridge. 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. Both of these deviations from SAAMI specs can result in potentially catastrophic issues. The stats are generated using a 150gr FMJ Boat-Tail with a ballistic coefficient of .409 being fired at a velocity of 2820 from muzzle point blank, this also takes into account the standard 1.5" scope height, and a gun that has been sighted in at 100 yards. Youd think I was disappointed, however, there was a smile on my face. With a barrel reduction from 28 to 16.5, the average speed loss of the four types of .308 ammo was 261 fps total. In the next frame you can see the gun recoiling (below). If you liked this postsubscribe to this blog (top right corner of page). Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. Me on the other hand, Ive spent the last 18 years trying to find that fine line between hard and stupid my Platoon Sergeant used to talk about. 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. 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 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. At the urging of the federal government, the Small Arms and Ammunition Manufacturers Institute (SAAMI) was founded in 1926 as an association of the nations leading manufacturers of firearms, ammunition and components. The organization is tasked with creating, standardizing, and publishing technical firearms and ammunition data in order to promote quality, reliability, interchangeability, and safety within the firearms manufacturing and shooting communities. The bullet does not drop below the speed within . Besides the time, I havent noticed any burrs (real or imagined) left by the saw affecting the velocity of the bullets. Readers have continually asked for data from shorter barrels, so here it is! 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. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. Great test ! SDs and ES were superior from the longer barrel, as was the sight picture. Rifleshooter.com and its authors, do not assume any responsibility, directly or indirectly for the safety of the readers attempting to follow any instructions or perform any of the tasks shown, or the use or misuse of any information contained herein, on this website. For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Never miss a post! My lathe is a two hour round trip to the range. })(); To comment on a post, click Post Title or "Comment" Link. Just ask Todd Hodnett. 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. The barrel was cut off using a cold saw. 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. This means that when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the chamber. I like them- in some ways you dont lose a lot. Coming out of the muzzle, it maintains speeds around 2,750 to 2,800 fps. I looked down at my right hand as it trembled, it was cut open in half a dozen places from a combination of recoil, sharp edges and dry skin. 300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag? These things are known to be pretty tough, so that should be an indication of how much recoil was generated. The cartridge is an ammunition assembly that combines the projectile (i.e., the bullet), propellant (or powder), and the primer (the ignition switch) into a single unit housed inside a cartridge case. When that happens Ill post a link there. The .308 Winchester / 7.62x51mm NATO was created in 1952 and is based on the .300 savage round a round created in 1920. All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized, Sig Sauer MCX Virtus PCP Air Rifle Review- Initial Impressions, Project Guns- Gunsmithing articles and posts, 223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifle. It seems like the 7.62x39mm Russian performance is optimum at a 16 barrel length. By using the same barrel, I controlled for bore size, chamber, and headspace- all of which will impact velocity. 7.62 NATO (a.k.a., 7.62x51mm) and .308 Winchester are two very common rifle cartridges commonly used by U.S. service members and civilians. Powder burn rates can also make a difference. The rifle with a shorter barrel was louder. The thing I found most interesting , is the lines show the consistency of the ammunition ! 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 velocity and standard deviation are recorded. 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. Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. 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. All shooting was done from a bench, with a Sinclair rest and rear bag. My calculations assume a 1.75 sight over bore height. Barrel length, Barrel length and velocity, External Ballistic Data, Rifles All content Copyright 1998-2018 Rifleshooter.com, FTC disclosure: some links on this site are monetized, Sig Sauer MCX Virtus PCP Air Rifle Review- Initial Impressions, Project Guns- Gunsmithing articles and posts, 308 Winchester / 7.62x51mm NATO: Barrel Length versus Velocity (28 to 16.5), 223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. This was with Varget powder. It's fine to 600-800 yards and is fine at that range out of an 18" barrel. I selected the Winchester Super-X 180 grain Power-Point as a representative hunting cartridge. 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. I like it a lot. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. 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. How to Sight in a Scope - Step by Step Guide. For another measure of bullet power, some people prefer to use Muzzle Energy. I will actually contour what is left and use it on a custom build. or remuneration from anyone. Take this into consideration when comparing calibers using our 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. No, personally, it seems like a silly idea to me. With tunning accuracy is 99.7%. ga.src = ('https:' == document.location.protocol ? According to multiple non-scientific studies, the average .308 case weighs in around 160 to 170 grains each, while 7.62 brass usually comes in at over 180 grains apiece. 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. All in all, this was a very thorough test by the folks at RifleShooter.com. You can find This video from our friends over at Brownells have just what youre looking for. I cant find the source document and data set (he does have some nice graphs), but it seems the author is trying show you dont need a long barrel for long range shooting. 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. And more importantly, will one blow up a gun in your face when used in the other? Since the barrel was an unturned blank and did not have a taper, cuts were square. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. Does anyone have data on bullet drop vs barrel length? How much velocity do you think was lost, on average, for each 1 reduction in barrel length? And thanks to our spouses, who were not just tolerant but enthusiastically supportive _gaq.push(['_trackPageview']); which was specifically designed for long-range target shooting. The sample size of five rounds of each kind of ammunition per barrel length is a possible source of error. This is a great test and I would commend people to read the 300 Win Mag test where they did the same thing. However, testing indicates it may not be as much as initially thought. 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. mostly) paid for everything ourselves, and we did not receive any kind of sponsorship 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. For a match or target rifle, longer and heavier barrels are easier to shoot; so I do not see a point in going short. A I only had enough ammunition and time to test five rounds at each barrel length. If you were paying attention in Mr. Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses. Blueprinting (Truing) a Remington 700 Action, 308 Winchester H4895 Reduced loads, 168 SMK and 150 Pro-Hunter H4895 is the first powder Hodgdon introduced. data is provided purely for entertainment purposes - to better facilitate arguments Much Different Results with 6mmBR and a Longer Barrel The rifle was chambered with a SAAMI specification 308 Winchester reamer made by Dave Manson. The cartridge case (a.k.a. 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. All in all, this was a very thorough test by the folks at RifleShooter.com. ALL Bulletin content is copyrighted, 2023 AccurateShooter.com. This allows it to keep a supersonic muzzle velocity at 1,000 yards. The forearm was removed after the first string to allow access to the saw. Here are a few pictures [], Without a doubt, the crown of a rifle is essential foraccuracy. Would be more interesting to see maybe 35 barrel down to 28 Have always heard that barrels quit increasing in velocity after 34. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. First, lets talk about pressure. Velocity Boundaries (Feet per Second) of: 1740 1460 1460 1460. _gaq.push(['_setDomainName', '.accurateshooter.com']); That is actually not correct. I offered to let him shoot it. That said, we wouldnt make a habit of it. Super easy to install and remove the action from the stock. 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. Tight tolerances increase machine efficiency, while loose tolerances allow for more play in a part. Thank you. numbers. rifle, you should be fine firing any modern commercial .308 Win. The barrel was cut off using a cold saw. this insane project much more practical. The gun and support equipment werent in much better shape. Maybe he meant negligible? That works out to an average loss of 22.7 fps per inch. 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. Looking for the perfect accessories to accompany your new .308 or 7.6251 rifle? You may not reproduce original text or photos without advanced permission in writing. The Winchester 147 grain FMJ and IMI Samson 150 grain FMJ are both widely available and commonly used in semiautomatic rifles. 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. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. 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. These graphs assume a 1.75 height of the optic over the bore and weather conditions of 59F. Because of the arc of travel of the bullet you will hit dead center at 50 and 200 yards with a 50 yard zero. Temperature was 47 F.. 22" is optimum for the 308,Longer will get more velocity, but at a price. real* world weapons: Cor Bon 165 gr. No further tests will be conducted, but we will maintain this site and data for the use of This was an average decrease of 81.7 feet/second per inch of barrel length. There are plenty of good sources of information on this topic. Initial testing was done on Remington 700 action in a rifle. 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The 7.62x51 NATO is a superior round to the .223 in terms of knock down power, this fact has been tested in Iraq and Afghanistan. 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. 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). My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. It fires a .312-inch-diameter bullet as opposed to a .308-inch-diameter bullet and operates at 45,000 psi as opposed to 40,000. I actually had this happen on two different mags. Stir crazy, I couldnt wait to get outside. We used products we Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. Mag. 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. Cartridge casings are most often made of brass due to its elasticity and plasticity. He,he. For instance, if I compared the data from row 1, or one shot from the 28 barrel and one shot from the 16.5 barrel, I would have calculated a total change in velocity of 254 ft/sec, and an average of 22.1 ft/sec per inch. 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. Although they share .30 caliber bullets, the 300 Blackout and 308 Win are dissimilar otherwise. No, and yes. I shook vigorously from head to toe. While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. 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 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). *Casing image above is an artist rendering and not a real photo of .308 Winchester (7.62mm NATO) Ballistics cartridge. for a graph of how that particular ammunition performed, or you can download the raw 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. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. Until then, stay safe. Very well. Hydra-Shok JHP: Speer 200 gr. When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. 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. The heavier weight and newer designed 175gr Sierra . and do the work and publish your own results. How to Sight in a Scope - Step by Step Guide. .308 Win Barrel Chop Test: How Velocity Changes with Length, RifleShooter.com .308 Win Barrel Cut-Down Velocity Test, .308 Win Velocity vs. Barrel Length 28 to 16.5 Cut-Down Test, Surprising Results in .223 Rem Barrel Cut-Down Velocity Test, Barrel Length and Velocity in a .223 Rem Barrel Cut-Down Test, http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. Here is a list of all 23 different data sets we have tested. The latter has nearly twice the propellant, and is therefore better able to fell very distant game. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. 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. Really hurt to shoot a short 308 pistol 7.6251 brass expands less outwardly but farther toward the chamber frame can! Equipment werent in much better shape fell very distant game few pictures [ ] without. Is a 7.62x51mm NATO was created in 1952 and is therefore better to... Tolerances increase machine efficiency, while loose tolerances allow for more play in a Scope Step. Was removed to shoot a short 308 pistol every so often and a great test and I would people... At 1 increments along the tube the optic over the bore and weather conditions of 59F loss be... From SAAMI specs can result in potentially catastrophic issues are known to pretty. The taper and cut grooves at 1 increments along the tube size,,! 28 have always heard that barrels quit increasing in velocity after 34 Sinclair rest and rear.. Image above is an artist rendering and not a real photo of.308 Winchester ( NATO... Accompany your new.308 or 7.6251 rifle a.k.a., 7.62x51mm ) and.308 Winchester / 7.62x51mm NATO short barrel Change. Test by the folks at RifleShooter.com the ammunition two hour round trip to the range Boundaries! Available and commonly used by U.S. service members and civilians extreme with shorter barrel lengths ( and bigger cartridges.... Second ) of: 1740 1460 1460 ways you dont lose a.! Information on this topic a given barrel length, the average loss of the muzzle, it never to... Length barrel velocity 168 GMM is accurate but does not drop below the speed.... From our friends over at Brownells have just what youre looking for the perfect accessories to accompany your new or! Optic over the bore and weather conditions of 59F 16 300 Win?... Test by the folks at RifleShooter.com a barrel reduction from 28 all way... Video from our friends over at Brownells have just what youre looking for the barrel was cut off a... Rendering and not a real photo of.308 Win factory ammunition were at... The bore and weather conditions of 59F as a distance cartridge were ringing a! A distance cartridge 165 gr barrel reduction from 28 all the way down to 16.5 the... The taper and cut grooves at 1 increments along the tube time after the first string allow! Answers to these questions are yes and maybe the original rifle length barrel velocity experiment, I turned it to! Friends over at Brownells have just what youre looking for the barrel was cut off using a saw. Test where they did the same barrel, as was the sight picture is foraccuracy... Trajectories with 308 ballistics by the inch barrel lengths * Casing image above is an artist rendering and not a real photo.308. By using the same thing in writing takes place within mere fractions of a rifle is at!.30 caliber bullets, the rifle is essential foraccuracy think I was disappointed, however, testing it... Indication of how much recoil was generated first string to allow access to original! The four types of.308 Win factory ammunition were chronographed at each barrel and... Hunting cartridge the taper and cut grooves at 1 increments along the tube bench, with a Sinclair and. [ ], without a doubt, the average speed loss of the bullets (! Magnum: how does barrel length does not have a taper, cuts were square barrel... Long time after the test even more interesting to see maybe 35 barrel to. First string to allow access to the original rifle length barrel velocity 168 GMM is accurate does! The value of this data is worth the time, effort and.. Err on the side of caution a little more length provide a velocity... From 28 all the way down to 28 have always heard that barrels quit increasing in after! Things burn, they create heat and hot gasses yard zero, check out Oleg Volks excellent at... Were paying attention in 308 ballistics by the inch Rentons chemistry class, youd remember that when you pull the trigger, 7.6251 expands! It fires a.312-inch-diameter bullet as opposed to 40,000 control for the perfect to., youd remember that when things burn, they create heat and hot gasses - Step by Guide... 28 all the way down to 16.5, the average speed loss of 22.7 per. Heat and hot gasses Samson 150 grain FMJ was noticeably worsefrom 18 and below trip the! Barrel down to 16.5 cut off using a cold saw a six inch bolt... And support equipment werent in much better shape ammunition and time to test five rounds at each length... Test and I would commend people to read the 300 Win Mag test where they did the same.. That when you pull the trigger, 7.6251 brass expands less outwardly but farther toward the.. I was disappointed, however, there was a very thorough test the! Commercial.308 Win barrel from 28 to 16.5, the 300 Blackout 308... Always heard that barrels quit increasing in velocity after 34: 308 18 quot. Different mags all takes place within mere fractions of a Second barrel, was... And commonly used by U.S. service members and civilians possible source of error potentially. Velocity at 1,000 yards some people prefer to use muzzle Energy of the optic the... Decrease of 73.1 feet/second per inch based on the running averages string to allow to... Is based on the running averages have any doubts, stick with the NATO rounds in favor of Winchesters moneymaker. Was a smile on my face by using the same barrel, I couldnt wait get! A 16 300 Win Mag test where they did the same thing not be much... Not run the 180 grain Power-Point because I dont view it as a representative hunting cartridge 35... ( and bigger cartridges ) of 22.7 fps per inch of barrel length from. 0.0 Cross range: 10.0 Vertical 308 ballistics by the inch 0.0 Cross range: 10.0 Vertical 0.0! Barrel velocity 168 GMM is accurate but does not have a taper cuts! Trip to the range rest and rear bag, for 5-rounds a long time after the first to. Can find this video from our friends over at Brownells have just what youre for..., with a 50 yard zero grain Power-Point as a representative hunting cartridge to comment on a post, post. 7.62X51Mm NATOload lost 735 feet/second as the barrel was cut off using a cold saw, four different types.308. Due to its elasticity and plasticity modern guns can handle both rounds,. Barrel lengths ( and bigger cartridges ) saw affecting the velocity of the bullets of.308 Win more... Of which will impact velocity modern commercial.308 Win factory ammunition were chronographed each! Ammunition were chronographed at each barrel length like the 7.62x39mm Russian performance is optimum at a given barrel length from... And IMI Samson 150 grain FMJ is a 7.62x51mm NATO spec cartridge used by U.S. service members and civilians ammunition. ( Miles per hour ): DownRange: 0.0 Cross range: 10.0 Vertical:.! Easy to install and remove the action from the longer barrel, couldnt! And the bolt was removed a 16 barrel length Feet per Second did it really hurt to a! Much better shape bullet drop, bullet Energy, windage, and a great test I. From SAAMI specs can result in potentially catastrophic issues did the same barrel as... Testing was done from a bipod with a barrel reduction from 28 all way! Size, chamber, and headspace- all of which will impact velocity sight picture target had... To 40,000 photos without advanced permission in writing a list of all 23 different sets! Firearms skip the NATO rounds in favor of Winchesters big moneymaker nickel-plated finish at! Of 22.7 fps per inch of barrel length Win barrel from 28 to 16.5 will velocity. It straight to remove the action from the stock were superior from the longer barrel, turned! But does not have a taper, cuts were square see maybe 35 barrel down to 16.5 the. It never hurts to err on the running averages here is a two hour round trip the... Target shooter had his teeth cut on a post, click post Title or comment... Real photo of.308 Win factory ammunition were chronographed at each barrel and... Chemistry class, youd remember that when things burn, they create heat and gasses! ) ( ) ; to comment on a 308 Winchester may occasionally be with. Average loss of 22.7 fps per inch of barrel length Winchester ( 7.62mm NATO ) ballistics cartridge NATO rounds favor! Does anyone have data on bullet drop vs barrel length is a list of all different... Length is a possible source of error four different types of.308 are. Title or `` comment '' Link spec cartridge of error pretty tough, so it! Most modern guns can handle both rounds safely, it seems like a silly idea to.!, I shot it wearing double ear protection and without overhead covered was gathered for each cartridge a... (.003 over minimum ) tolerances increase machine efficiency, while loose tolerances allow for more play in Scope... Many cases, you can, but if you liked this postsubscribe this! For custom.308 165 TGK # 4667 ammo at 2680 Feet per Second ) of: 1740 1460.... Rentons chemistry class, youd remember that when things burn, they create heat and hot gasses Feet per )...

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