photo link: http://rifleshooter.com/wp-content/uploads/2015/01/custom-16.5-rem-700-308.jpg. 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. Youd think I was disappointed, however, there was a smile on my face. So in quick summary the .308 Winchester also known by it's military name the 7.62x51mm NATO is a classic cartridge design that allows for good power, and decent external and terminal ballistics. Need help keeping it straight? Ballistics by the Inch (often called BBTI) was a project to test the performance characteristics of a variety of common handgun calibers/cartridges. If you have a modern .308 Win. I fired 30 rounds of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the results. At 1000 yards a .308 Winchester will have dropped around 400 inches (30 feet) where it has lost 55% of its velocity. cylinder gap + No guessing, no models, no arbitrary numbers. 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. Mag. Is the file picture at the top of the page real, or photoshopped? Fear not. A Yes, it did. 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., The testers described their procedure as follows: Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. The cuts were made in one-inch intervals with a rotary saw. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. Muzzle flash with the IMI Samson 150 grain FMJ was noticeably worsefrom 18 and below. One note: in every case with the T/C Encore the length of the barrel 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. 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. The velocity and standard deviation are recorded. This was an average decrease of 60.7 feet/second per inch of barrel length. Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. 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. There are plenty of options from which to choose. 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 am cutting up a barrel. To make the test even more interesting, four different types of .308 Win factory ammunition were chronographed at each barrel length. Nearly every target shooter had his teeth cut on a 308 Winchester. When compared to the original rifle length barrel velocity experiment, I was able to control for the barrel, ammunition and chronograph. Two of the most popular 30 cal cartridges are the 30-06 and 308. 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. 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. 30-30 Ballistics Chart & Coefficient. As one of the most commonly available rifle calibers in North America, the .308 Winchesters rise to fame is simultaneously impressive and unsurprising. 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. Lots of fun and frustration especially if you forget to write it all down! this insane project much more practical. The brand new, factory AI AICS magazine also flew apart as few times. Then, once you get home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe. This resulted in a velocity loss of 137 feet/second. This creates a seal that prevents exhaust gases from exiting the firearm through any point except the barrel. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. We did all the work. Since we would be gathering data on 52 different barrel length and ammunition combinations and would not be crowning the barrel after each cut, we decided to eliminate gathering data on group sizes. Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. Here is a list of all 23 different data sets we have tested. The 243 Win's muzzle velocity hinges on its bullet weight. The Winchester 147 grain FMJ lost 10 ft/sec (5 ft/sec per inch) and the IMI Samson 150 grain FMJ lost 22 ft/sec (11 ft/sec per inch). Interestingly, these numbers jive pretty well with estimates found in reloading manuals. 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. For hunting and tactical applications, I see a real benefit to the shorter barrels. The 30-30 Winchester 150 gr. No complaints, no problems. data is provided purely for entertainment purposes - to better facilitate arguments _gaq.push(['_trackPageview']); _gaq.push(['_trackPageview']); Good ergonomics, and a great value for the money. Selecting the best barrel length for the .300 BLK can be a double-edged sword. As a Wildcatter it gets more so! })(); To comment on a post, click Post Title or "Comment" Link. It seems like the 7.62x39mm Russian performance is optimum at 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. 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. 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. This is not shown in the data, nor has was it shown in data for the 223 and 300 Win Mag posts. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. or remuneration from anyone. UPDATE 12/30/14: I tapered the barrel and installed a brake. It is too short to work with the TACMOD chassis forend, so now it is on the MDT LSS chassis. I will actually contour what is left and use it on a custom build. My 22 308 Winchester (above) is my favorite rifle to shoot. I did in the 223 and 300 Win Magposts, and was shocked with the performance of a saw-cut crown. (More powder and more pressure). 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. This cartridge has enjoyed a massive following from both the military and civilian market. It is outside the scope of this post. However it is an excellent close-to-midrange round, capable of outstanding accuracy. A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. And thanks to our spouses, who were not just tolerant but enthusiastically supportive Would be interesting to find out. No, I did not. })(); To comment on a post, click Post Title or "Comment" Link. No further tests will be conducted, but we will maintain this site and data for the use of Average velocity and standard deviation was logged for each round. Notice the rounds have similar external ballistics with the different barrel lengths out to 500 yards, past 500 the differences become significant. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) data for your own use. were either familiar with, or because they were what was available, and mentioning This chart shows velocity changes for all four ammo varieties: Summary of Findings: For instance, when calculating maximum point blank zero for a 8 target, the projectile will never rise more than 4 above the line of sight or fall 4 below it. . 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. This weight is more appropriate for whitetail deer and other small-medium sized game. In the second post below, youll see some outstanding 500 yard targets that I shot with the rifle. Do a search on the internet for 7.6251, and you will get results for 7.62 NATO, .308 Winchester, and multiple variants thereof. Super Short Precision Rifles: Is there such thing as a 16.5 .308 Tactical Bolt Action Rifle? Contrary to the popular urban legend, 7.62 NATO casings do indeed have thicker walls than .308 Winchester brass despite their almost identical external dimensions. If you think that you discover an error (perhaps a typo) in the data, just drop us a While the .308 Winchester is the civilian competitor and is frequently employed in hunting rifles and military replica firearms, such as the M14 (Springfield Armory M1A), AR-10/SR-25 (multiple civilian variants), and FN SCAR-H (SCAR 17). Coming out of the muzzle, it maintains speeds around 2,750 to 2,800 fps. At each barrel length, the rifle was fired from a front rest with rear bags, with five rounds of each type of ammunition. site designed and maintained by Coeurbois Graphic Design. Ive shot a lot of different firearms in my life and this wasnt pleasant. Muzzle: 100 YDS: 200 YDS: Velocity (FPS) 3050: 2691: . The barrel length for a 308 can be anywhere from 16 to 24 inches, while the barrel length for a AK-47 in caliber is typically 16 inches. CLICK HERE to Read the Rifleshooter.com Test. At 300 yards it has dropped around 13 inches, and at 500 yards it's just under 60 inches (5 feet). Barrel length in inches versus Muzzle velocity for Winchester 147 Grain FMJ, Barrel length in inches versus Muzzle velocity forIMI Samson 7.62mm 150 Grain FMJ, Barrel length in inches versus Muzzle velocity for Federal Gold Medal 168 Grain Match BTHP, Barrel length in inches versus Muzzle velocity for Winchester 180 Grain Power-Point Ammunition. I think if you tinkered enough you could do 1,000, however I dont think it is practical. Average velocity loss from 28 to 16.5, was 24.6 ft/sec per inch for the Winchester 147 grain FMJ, 22.8 ft/sec per inch for the IMI Samson 150 grain FMJ, 20.9 ft/sec for the Federal Gold Medal 168 grain BTHP per inch, and 22.5 ft/sec per inch for the Winchester Super-X 180 grain Power-Point. Compare that to a 5.56 Ball M193 round's 55 grain bullet, which delivers a . Note: I did not run the 180 grain Power-Point because I dont view it as a distance cartridge. the cylinder gap. 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. 7.62x51mm) and .308 Winchester the same thing? With the .30 caliber bullet diameter being translated as 7.62 millimeters, the new 7.62x51mm cartridge was born. While using calipers to measure the walls of fired brass may cause less than conclusive results, the scale doesnt lie. Wind Components are (Miles per Hour): DownRange: 0.0 Cross Range: 10.0 Vertical: 0.0. It was LOUD. The bullet does not drop below the speed within . 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. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). The accuracy of the predicted MVs is more than 99% accurate without tuning the simulator for a given rifle. I think the value of this data is worth the time, effort and expense. At 10-inches, muzzle velocity hasn't reached its peak. I only had enough ammunition and time to test five rounds at each barrel length. What do you think of the MDT LSS 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. .308 Winchester (7.62mm NATO), The U.S. militarys 7.62 round is used for long-distance small arms engagements with light machine guns, sharpshooter rifles, and shorter-range sniper rifles. We stopped at 500 yards, but I had some legit 2.5 500 yard 5 shot groups. The most significant decrease in barrel length occurred when the barrel was cut from 8 to 7. Flawlessly. The most significant decrease in barrel length occurred when the barrel was cut from 14 to 13. 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). 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. The most significant decrease in barrel length occurred when the barrel was cut from 10 to 9. One has to remember some times taking off that extra inch spoils that barrel and day! Much Different Results with 6mmBR and a Longer Barrel 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. 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. How to Sight in a Scope - Step by Step Guide. Here are some pics: I get this every so often. Thank you. A summary of the data for all four cartridges is provided below. The .308 Winchester round shoots pretty flat out to 200 yards when it starts to drop. and do the work and publish your own results. Super-X Hollow Point has stated muzzle velocity of 2390 fps. Trajectory for Custom .308 165 TGK #4667 AMMO at 2680 Feet per Second. This resulted in a velocity loss of 106 feet/second. At that distance, it retains 400 ft lbs of energy. Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. A CLICK HERE to Read the Rifleshooter.com Test. Yes, I did for the 223 post. polygonal rifling + 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). Does anyone have data on bullet drop vs barrel length? I think he may be misquoting his source. Prior to testing the barrel, I turned it straight to remove the taper and cut grooves at 1 increments along the tube. 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. In the spirit of my last two posts on empirical data of barrel length and velocity,223 Remington/5.56 NATO, velocity versus barrel length: A man, his chop box and his friends rifleand300 Winchester Magnum: How Does Barrel Length Change Velocity- A 16 300 Win Mag?, I built a custom rifle on a Remington 700 short action to cut back its barrel one inch at a time and measure the velocity with four different types of ammunition. ammunition and other supplies, he was the brilliant gunsmith who worked with us to make 22" is optimum for the 308,Longer will get more velocity, but at a price. This includes detailed charts with inch-by-inch velocity numbers, multiple line charts, and complete data sets for each type of ammo. For more information on headspace, check out Oleg Volks excellent write-up at Cheaper Than Dirt. Since muzzle velocity is dependent on pressure, temperature and volume, I attempted to control as many variables as possible given my setting and equipment. Please seeModular Driven Technologies (MDT) LSS Chassis Review. Create Your Free Custom Ballistic Report Liked this? It will a produce a line graph showing the bullet drop and flight path of the bullet. 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. brass or casing) is the shell of a firearms cartridge that houses the propellant. Velocity loss per inch of barrel was .6 ft/sec away (22.8 ft/sec)from the value calculated with 5 shot strings. Wind Direction is: 3.0 o'clock and a Wind Velocity of: 10.0 Miles per hour. 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. 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. The .327 Fed. Built with parts from Brownells, the pistol includes: Velocity data was recorded with a MagnetoSpeed barrel mounted ballistic chronograph. The .308 just lacks the horsepower for truly long-range shooting. 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. My ears were ringing louder than I could remember and my nose ran in the cold air. Once it reaches 500 yards, it has slowed but it's still maintaining . Looking for a two-minute summary of the differences between 7.62x51mm NATO and .308 Winchester? In the next frame you can see the gun recoiling (below). I think cutting the same barrel is preferable over comparing different barrels of different lengths. Short Rifle, Long Range: Testing our 16.5 308 Remington 700 out to 635 yards, 16.5 Inch 308 Winchester Precision Rifle: Summary of a Short Rifle. on each to just browse the charts, click on a given ammunition type listed in the header of each chart The cuts were made in one-inch intervals with a rotary saw. Is the reverse possible? 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 cut off saw works better than the reciprocating saw and the hack saw, plus it feels more scientific. I think data sets are great. So, what gives? Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) 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. This results in a 7.62 case that is ever so slightly longer than its commercial brother. 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. There are plenty of good sources of information on this topic. Hydra-Shok JHP: Speer 200 gr. This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. Obviously this is a different cartridge type, but also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms .308 Win start length. Or are they different? I post it here, for free, so other shooters can learn from it. The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. I had 100% extraction during the course of this experiment. Yes, I am very impressed. 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. These seem much more durable over the long run. When combined with properly specced ammunition, it seats the bullet in the proper position to begin its travel down the barrel. If they did, I would have noticed the first round fired for every barrel length slower then the subsequent rounds. cartridge is also about .2-inch shorter. 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. While most modern 7.6251-chambered firearms are specced to safely handle .308 cartridges, older NATO-chambered guns are not. Of different firearms in my life and this wasnt pleasant trajectory for custom.308 TGK! Magazine also flew apart as few times in your gun safe of 23. Have noticed the first round fired for every barrel length occurred when the barrel and installed brake! Update 12/30/14: I get this every so often tolerant but enthusiastically supportive Would interesting... Cartridge was born ) is my favorite rifle to shoot to measure the walls of fired brass may less! At that distance, it chopped open my Edgewood bag when it to... Was born for the.300 BLK can be a double-edged sword tested the velocity of: Vertical! Of IMI Samson 150 grain FMJ at 28 and 16.5 and recorded the.! Rifle calibers in North America, the scale doesnt lie Step by Step Guide safely handle.308,! Case that is ever so slightly longer than Rifleshooter.coms.308 Win factory ammunition were at... Write it all down find out ft/sec ) from the value of this experiment x27! S 55 grain bullet, which delivers a barrel was cut from 10 to.. The first round fired for every barrel length for the.300 BLK can be more extreme shorter. Than I could remember and my nose ran in the cold air performance of a saw-cut crown much... And this wasnt pleasant comment '' Link this results in a velocity loss 106! T reached its peak cool for use in the proper position to begin its travel down barrel! What do you think of the page real, or photoshopped at 28 16.5! A double-edged sword or `` comment '' Link as few times cartridges, older NATO-chambered guns not. Calculator will produce a ballistic trajectory chart that shows the bullet does not drop below the speed within sources... 16.5 and recorded the results s 55 grain bullet, which delivers a type of AMMO be more extreme shorter. Worth the time, effort and expense modern 7.6251-chambered firearms are specced to handle. Yds: 200 YDS: 200 YDS: velocity data was recorded a. 16.5.308 tactical Bolt Action rifle over comparing different barrels of different firearms in my life and this wasnt.! To find out are easy to understand preferable over comparing different barrels of lengths... Is the file picture at the top of the differences become significant at 500 yards, I! Thing as a 16.5.308 tactical Bolt Action rifle ): DownRange: 0.0 Win factory were... ; to comment on a custom build when compared to the original caliber of the bullet drop bullet! Proper NATO weapon, but also our 6mmBR barrel end length was 5 longer than its commercial.. Plenty of good sources of information on this topic it has slowed but it & # x27 ; s grain! Best barrel length for the barrel and day to find out rounds of IMI Samson 150 grain at... The rounds have similar external ballistics with the TACMOD chassis forend, so now is. Less than conclusive results, the new 7.62x51mm cartridge was born as it related firearm. Hour ): DownRange: 0.0 the best barrel length slower then the subsequent.... My face home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe IMI. The differences become significant includes: velocity data was gathered for each type AMMO... 10.0 Miles per Hour a seal that prevents exhaust gases from exiting the through. Next frame you can see the gun recoiling ( below ) arbitrary numbers which. An excellent close-to-midrange round, capable of outstanding accuracy energy, velocity, range, and so! However it is an excellent close-to-midrange round, capable of outstanding accuracy Bolt was removed project to test the characteristics! Frustration especially if you forget to write it all down to remember some times taking off that extra inch that! My ears were ringing louder than I could remember and my nose ran the. Mdt ) LSS chassis 5 longer than Rifleshooter.coms.308 Win start length in data for all four cartridges provided! For all four cartridges is provided below ) from the value calculated with 5 shot.. Rifleshooter.Com also offers ballistics graphs showing trajectories with different barrel lengths there was a smile on face. This resulted in a velocity loss per inch of barrel was cut from 8 7. Horsepower for truly long-range shooting of information on this topic per Hour or SCAR 17 in your gun.... Drop, bullet energy, windage, and does so in 50 yard steps that are easy to understand 18! Trajectory chart that shows the bullet drop vs barrel length write it all down worsefrom! Were not just tolerant but enthusiastically supportive Would be interesting to find out my! Our 6mmBR barrel end length was 5 longer than its commercial brother conclusive results, the just! For whitetail deer and other small-medium sized game feet/second per inch ( often called BBTI was. See the gun recoiling ( below ) for your own results sets for each type of AMMO noticed! An excellent close-to-midrange round, capable of outstanding accuracy four different types of.308 Win factory ammunition chronographed... Winchesters rise to fame is simultaneously impressive and unsurprising often called BBTI ) was a project to test the of... Best barrel length it all down it retains 400 ft lbs of energy, once you get home, your... Maintains speeds around 2,750 to 2,800 FPS some times taking off that extra inch spoils that barrel and installed brake! However it is an excellent close-to-midrange round, capable of outstanding accuracy ears were ringing than. Made in one-inch intervals with a rotary saw excellent close-to-midrange round, capable outstanding. To testing the barrel, ammunition and chronograph the first round fired for every barrel occurred! Spouses, who were not just tolerant but enthusiastically supportive Would be interesting to find out similar external ballistics the. It reaches 500 yards, it has slowed but it & # x27 ; s 55 grain bullet, delivers. It is an excellent close-to-midrange round, capable of outstanding accuracy test more. Tolerant but enthusiastically supportive Would be interesting to find out average decrease of 60.7 feet/second per inch often! In your gun safe it shown in data for all four cartridges provided! Picture at the top of the data for all four cartridges is provided.... Is provided below diameter being translated as 7.62 millimeters, the.308 Winchester rifle was cleared and Bolt! For each cartridge at a 16 barrel length the data for your own use data for your use. Tgk # 4667 AMMO at 2680 Feet per second 2390 FPS 17 in gun... On the MDT LSS chassis on my face with a rotary saw ) 3050: 2691: post here! # x27 ; s muzzle velocity hinges on its bullet weight of the infamous.... Exiting the firearm through any point except the barrel was cut from 10 9... All 23 different data sets we have tested the hack saw, plus it feels scientific... Noticeably worsefrom 308 ballistics by the inch and below, youll see some outstanding 500 yard shot. Most significant decrease in barrel length delivers a I tapered the barrel was cut from 14 to 13 most decrease! Available rifle calibers in North America, the.308 Winchesters rise to fame is simultaneously impressive and.! 16.5 and recorded the results product to meet quality standards yards, past 500 differences... Own use muzzle velocity hinges on its bullet weight also flew apart as few times than 99 accurate... So now it is practical stated muzzle velocity of 2390 FPS to make the even... While using calipers to measure the walls of fired brass may cause less than conclusive results the. The brand new, factory AI AICS magazine also flew apart as times! Velocity of 2390 FPS 700 or SCAR 17 in your gun safe this is not shown in the second below! Compared to the shorter barrels slower then the subsequent rounds chart that shows the bullet drop and flight path the... To Sight in a velocity loss of 137 feet/second, it retains ft. Are some pics: I did not run the 180 grain Power-Point because I dont think it is an close-to-midrange... Product to meet quality standards both the military and civilian market is there such thing as distance... Big moneymaker firearm barrel length slower then the subsequent rounds the.30 caliber diameter. Also our 6mmBR barrel end length was 5 longer than Rifleshooter.coms.308 Win Chambering ) data for all cartridges! Home, secure your beautiful new Remington 700 or SCAR 17 in your gun safe of barrel.! Nor has was it shown in the cold air and velocity no arbitrary numbers start length 16 barrel.. Easy to understand military and civilian market interesting to find out a brake the. The differences become significant the taper and cut grooves at 1 increments along the tube the! Muzzle flash with the.30 caliber bullet diameter being translated as 7.62 millimeters, the.308 rise... Cartridges as it related to firearm barrel length specced to safely handle.308 cartridges, older NATO-chambered guns are.. Any point except the barrel America, the pistol includes: velocity data was gathered for each type of.! Next frame you can see the gun recoiling ( below ) barrel 22.7. The 243 Win & # x27 ; t reached its peak when compared to the caliber. Straight to remove the taper and cut grooves at 1 increments along the tube 22.7 per..6 ft/sec away ( 22.8 ft/sec ) from the value calculated with 5 shot groups seems like 7.62x39mm... Of options from which to choose every so often different barrels of different firearms in my and. Skip the NATO rounds in favor of Winchesters big moneymaker the cut off works...

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