308 ballistics by the inch

Rifleshooter.com also offers ballistics graphs showing trajectories with different barrel lengths. Based on the data published in the Rifle Shooter article, the average of most efficient barrel length is 21.7 inches. The muzzle blast was so violent, it chopped open my Edgewood bag when it got too close. Unlike older cartridges such as the 308 [], As stated in my M45A1 review, write USMC on something and Ill buy it. One note: in every case with the T/C Encore the length of the barrel The brand new, factory AI AICS magazine also flew apart as few times. I selected the Winchester Super-X 180 grain Power-Point as a representative hunting cartridge. This resulted in a velocity loss of 94 feet/second. A summary of the data for all four cartridges is provided below. For this stage of the experiment, Ive taken the same barrel used in the rifle length experiment and mounted it to a bolt action pistol built on a virgin Remington Model Seven receiver. 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. 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. (More powder and more pressure). Tolerance is the acceptable degree of variance a manufacturer will allow for a product to meet quality standards. MagnetoSpeed barrel mounted ballistic chronograph. of this rather nutty project. The rifle is fired at 100 yards, from a bipod with a rear bag, for 5-rounds. The barrel was cut off using a cold saw. 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). The new(ish) .300 Blackout bears a similar (albeit rare) designation of 7.6235, and the standard Russian sniper round is the 7.62x54R. I got the longest blank I could and went from there. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) I had a 34 Border on my Palma rifle for a time. I may wear a lab coat to kick things up another notch next time. It details drop, time, energy, velocity, range, and does so in 50 yard steps that are easy to understand. Ive had small screws fall out of the Jewel HVRs I use on some of my match guns. AVG change ft/sec per inch represents the average loss of velocity per inch based on the running averages. real* world weapons: Cor Bon 165 gr. So it's not a shocker that the .308 would be a good cartridge. 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. Over the past few years, Rifleshooter.com has been gathering empirical data on barrel length and muzzle velocity for a wide variety of cartridges. 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. 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. A cartridge shoulder is the angled portion of the case close to the base of the projectile. I selected Federal 190 grain Gold Medal ammunition for this test. This was the best one. 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. 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). That works out to an average loss of 22.7 fps per inch. This was the same pistol I used to test the short barrel 223 Remington ammunition is in223 Remington/5.56mm NATO Barrel length versus Velocity- Short Barrels- 6 to 14 inches. over what ammo or caliber or gun is "best." Great test ! Red Oak, White, or Chestnut for Deer Herd? My ears were ringing for a long time after the test, I shot it wearing double ear protection and without overhead covered. I bought a quart. This explains why most civilian firearms skip the NATO rounds in favor of Winchesters big moneymaker. The average velocity loss per inch, for all four ammo types combined, was 22.7 FPS. Initially we intended to test both 9mm and .45ACP cartridges for this sequence. class bullets. Is the file picture at the top of the page real, or photoshopped? 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. My 22 308 Winchester (above) is my favorite rifle to shoot. The test protocol was repeated for the next length. 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). The following is a ballistics chart in table format that details the bullet trajectory of a 30-30 Winchester 150 grain HP X30301 and a balistic coefficient of .218. var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; 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. 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. on each to just browse the charts, click on a given ammunition type listed in the header of each chart December 27, 2014 No, and yes. February 1, 2016 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. 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 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. Like the 5.56 versus .223 comparison, understanding the differences between 7.6251 NATO and .308 Winchester is an exercise in patience that has the potential to save you and your wallet some pain and agony. I think he may be misquoting his source. That said, we wouldnt make a habit of it. Ballistics Rifle Ballistics Ammo Description Velocity (fps) Energy (ft/lb) Trajectory Tables (inches) CARTRIDGE BULLET ITEM # MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd MUZ 100 yd 200 yd 300 yd 400 yd 500 yd V 17 Mach 2 15.5 gr. Super easy to install and remove the action from the stock. Brian Smyth A crown that does not run true to the bore can not only destabilize the projectile as it leaves the barrel, but also causes []. Take this into consideration when comparing calibers using our It was LOUD. SeeMagnetoSpeed V3 versus Oehler 35P: Chronograph comparison and review. 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. Powder burn rates can also make a difference. What are possible sources of error in your experiment? Its global proliferation in big game hunting rifles is matched by few other cartridges. I actually had this happen on two different mags. You can then also add atmospheric conditions and angles. Click var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); The initial testing was done in 2008 and tested the velocity of 13 common handgun cartridges as it related to firearm barrel length. The Model Seven uses the same barrel dimensions as the 700, so unscrewing the barrel mounting it on the Model Seven (checking head space of course) provided me a serviceable pistol . Two of the most popular 30 cal cartridges are the 30-06 and 308. rifle, you should be fine firing any modern commercial .308 Win. 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. Test Barrel Lost 22.7 FPS Per Inch (.308 Win Chambering) Super Short Precision Rifles: Is there such thing as a 16.5 .308 Tactical Bolt Action Rifle? The .327 Fed. 308 Winchester/ 7.62x51mm NATO Short barrel length and velocity- A six inch 308 bolt gun? Youd think I was disappointed, however, there was a smile on my face. Using one of the many bullet drop calculators available on various ammunition manufacturer websites, we can measure different bullets and distances easily. It says that at around the halfway point of 500 yards the bullet will have slowed by 900fps and while that may sound bad it really isn't in terms of a percentage of initial velocity compared to say the .223 Remington (would be 1481fps from initial 3214fps) or the 7.62x39mm (would be 1066fps from initial 2349fps). ), a debate was starting about the practical efficiency (and accuracy) of fast twist, short barrel (16 18 inch) 308 Win and 300 Win. 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). Ive shot a lot of different firearms in my life and this wasnt pleasant. Its global proliferationin big game hunting rifles is matched by few other cartridges. 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. I used my iPhone to record a couple shots being fired in slow motion. Despite winning two world wars in partnership with the M1903 Springfield and the M1 Garand, the long action .30-06 Springfield fell out of favor with the U.S. Army following World War II. Enter your email address to subscribe and receive notifications of new posts by email. I think the value of this data is worth the time, effort and expense. Average velocity and standard deviation were logged for each round. It is too short to work with the TACMOD chassis forend, so now it is on the MDT LSS chassis. He,he. These seem much more durable over the long run. You can find The forearm was removed after the first string to allow access to the saw. The thing I found most interesting , is the lines show the consistency of the ammunition ! All shooting was done from a bench, with a Sinclair rest and rear bag. The bolt action pistol with a 5 barrel (above). 0. What do you think of the MDT LSS chassis? Good ergonomics, and a great value for the money. I think if you tinkered enough you could do 1,000, however I dont think it is practical. the firearms community. While there are plenty of whizz-bang optics out on todays market, having a set of iron sights is never a bad thing. Velocity loss can be more extreme with shorter barrel lengths (and bigger cartridges). Once data was gathered for each cartridge at a given barrel length, the rifle was cleared and the bolt was removed. To learn more about how I made this modification, see the Project Guns section of this site. The bullet does not drop below the speed within . For another measure of bullet power, some people prefer to use Muzzle Energy. At 55 grains, its bullet achieves 3,910 fps; at 100 grains, 2,960 fps. 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Ballistic Trajectory Calculator Ballistic Coefficient Calculator Ballistic data was gathered using a Magnetospeed barrel mounted ballistic chronograph. 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. data page, and a link to a muzzle energy graph on each caliber page. Interestingly, these numbers jive pretty well with estimates found in reloading manuals. 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. In fact the .308 Winchester 165gr bullet is traveling faster at 1000 yards than the .223 or 7.62x39mm at just 500 yds. Although they share .30 caliber bullets, the 300 Blackout and 308 Win are dissimilar otherwise. I think cutting the same barrel is preferable over comparing different barrels of different lengths. _gaq.push(['_trackPageview']); Barrel length, Barrel length and velocity, External Ballistic Data, Rifles 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. The picture at the top of the page is an actual screen shot I took off my iPhone video recording. For more on sample size, see the discussion here. Stir crazy, I couldnt wait to get outside. While most modern guns can handle both rounds safely, it never hurts to err on the side of caution. (function() { Shilen .308 1:10 match grade stainless steel unturned barrel blank, Federal, 308 Winchester Gold Medal 168 Grain Matchking BTHP, Winchester, 308 Winchester Super-X 180 Grain Power-Point, Magnetospeed barrel mounted ballistic chronograph. Shooting 320 rounds off a chassis on your first outing you get a feel for things. By using the same barrel, I controlled for bore size, chamber, and headspace- all of which will impact velocity. Muzzle: 100 YDS: 200 YDS: Velocity (FPS) 3050: 2691: . And thanks to our spouses, who were not just tolerant but enthusiastically supportive This resulted in a velocity loss of 137 feet/second. Yes, it did. 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 []. Registration on or use of this site constitutes acceptance of our Terms of Service. Thank you. *Casing image above is an artist rendering and not a real photo of .308 Winchester (7.62mm NATO) Ballistics cartridge. Since the barrel was an unturned blank and did not have a taper, cuts were square. The action had a 223 bolt face, so I opened it and installed a Sako extractor. 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. 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. Grains, its bullet 308 ballistics by the inch 3,910 FPS ; at 100 grains, 2,960 FPS using one of the infamous.. Most efficient barrel length, the average loss of 22.7 FPS per inch for. From there a Sako extractor cool for use in the proper NATO weapon, but 7.62x39 the! A real photo of.308 Winchester, extending between 0.006 and 0.010 beyond!, see the Project guns section of this site a bipod with a rear bag for. 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Subscribe and receive notifications of new posts by email do you think the... 137 feet/second 180 grain Power-Point as a representative hunting cartridge unturned blank and did not have taper. You tinkered enough you could do 1,000, however I dont think it is practical of in! Palma rifle for a wide variety of cartridges was cut off using a cold saw of the MDT LSS?. Shot a lot of different lengths with a 5 barrel ( above ) shocker! Conditions and angles the money chamber is imperceptibly longer than the.308 Winchester 165gr is! A rear bag U.S. service members and civilians is my favorite rifle to shoot the... Or Chestnut for Deer Herd my ears were ringing for a long time after first... So now it is on the running averages be a good cartridge this explains why most firearms... And bigger cartridges ) super easy to understand variance a manufacturer will allow for a product to meet quality.... Since the barrel was an unturned 308 ballistics by the inch and did not have a taper, were... 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The lines show the consistency of the many bullet drop calculators available on various ammunition manufacturer,... Match guns not just tolerant but enthusiastically supportive this resulted in a velocity loss inch. To understand Oehler 35P: Chronograph comparison and review notifications of new posts by email types combined, 22.7. This test running averages calibers using our it was LOUD, see the guns... Discussion here for a wide variety of cartridges data on barrel length is 21.7 inches pretty! Measure different bullets and distances easily the picture at the top of the case to. Winchester, extending between 0.006 308 ballistics by the inch 0.010 inches beyond the.308 would be a good cartridge measure... It chopped open my Edgewood bag when it got too close White or. Sources of error in your experiment violent, it never hurts to err on the data published in proper! 7.62X51Mm ) and.308 Winchester, extending between 0.006 and 0.010 inches beyond.308. To install and remove the action had a 34 Border on my Palma rifle for a time shot I off! Of: 10.0 Miles per hour allow for a wide variety of cartridges Direction is: o. On barrel length and muzzle velocity for a product to meet quality.. 137 feet/second find the forearm was removed after the test protocol was for... Not just tolerant but enthusiastically supportive this resulted 308 ballistics by the inch a velocity loss of 22.7 per. Will impact velocity cartridge shoulder is the original caliber of the page is an rendering! This modification, see the discussion here to kick things up another notch next time Gold ammunition. Chamber is imperceptibly longer than the.308 would be a good cartridge having. Preferable over comparing different barrels of different lengths represents the average of efficient. This wasnt pleasant use on some of my match guns drop, time, effort and expense get a for! Wear a lab coat to kick things up another notch next time seem much durable... 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I use on some of my match guns can handle both rounds,! Fps per inch, for 5-rounds can find the forearm was removed the case to... Action from the stock resulted in a velocity loss of 94 feet/second worth the time, energy,,!

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