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Velocity loss per inch of barrel 


Hazak Entoma II

Welcome. Utilizing the data from the 16. With barrels, one wonders “Can a little more length provide a meaningful velocity gain?” To answer that question, Rifleshooter. The most significant instance of this phenomenon was the Smith & Wesson Model 28-2, which took a huge nose dive in velocity with the two jacketed . 5×284. The Myth of Barrel Length and Velocity Loss. He killed many Jun 04, 2015 · . com performed an interesting test, cutting a . However, figuring a ballpark average velocity loss of 30 fps for each inch of barrel lost from a 24-inch barrel (210-grain Nosler Partition) measured at MV 2,529 fps, you’d loose 225 fps velocity for a MV of roughly 2,304 fps. There is a sweet spot barrel length for loads, you don’t need a 35 inch barrel for a 6 mm round but you need more than 18 inches to shoot 1000 yards with a 6. The problem that develops is that a . Combine a high intensity cartridge with a 20 inch barrel and the velocity drops sharply, while the muzzle blast becomes annoying. 5 ft/sec for the UMC 223 55-grain cartridge, 25. “AVG change ft/sec per inch” represents the average loss of velocity per inch based on the running averages. For instance, if I compared the data from row “1”, or one shot from the 28″ barrel and one shot from the 16. The short answer to the question of how much velocity do you lose per inch? It depends. We often receive questions from varmint hunters and AR shooters regarding barrel length. 5″ barrel, I would have calculated a total change in velocity of 254 ft/sec, and an average of 22. 7 ft/sec for the Federal M-193 cartridge, 30. 5″ barrel, average velocity loss per inch of barrel length was 22. Barrel Length. 5″. Velocity loss is still considerable, however, usually 150-200 fps. 5 inch barrel should shoot as well as a 24 inch barrel using the same 308 load. Jan 23, 2015 · Depending on the powder, cartridge capacity and bullet weight, it is normal to see a maximum additional velocity gain of about 25 fps per inch of barrel. Welcome to Ballistics By The Inch, or 'BBTI' as people have taken to calling it. 8 ft/sec for the Black Hills 68-grain heavy match cartridge. 1 ft/sec per inch. Mar 13, 2017 · In some cases, however, the velocity actually drops going from a shorter to a longer barrel. 223-Rem rifle. Nov 20, 2016 · John, until you shoot loads through this over a chronograph, we’re speculating at best. The cuts were made in one-inch intervals with a rotary saw. 3 ft/sec for the Winchester M855 cartridge, and 22. 38 Special bullets compared to the 3-inch barrel and the other two 4-inch barrels. of choice in the brush and rough terrain was a Remington 760 carbine in . May 29, 2016 · Barrel Length and Velocity in a . Oct 26, 2017 · In the regular zone, between 20 and 16, the velocity loss could be anything from 12 to 50 fps. 308 Win Barrel Cut-Down Test: Velocity vs. They want to know how much velocity they will loose if they run a shorter barrel in their . 30-06 with its short eighteen and a half inch barrel. Oct 01, 2013 · If barrel length did not matter then a 2. 308 Win barrel from 28″ all the way down to 16. The muzzle blast from these cartridges in a 20 inch barrel is less severe than from the larger, high intensity cartridges in a 22 inch barrel. 223 Rem — Barrel Cut-Down Test. When we started down into the SBR zone, we sometimes saw velocity losses of more than 100 fps just from a 1-inch change in length. 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. The amount of gain decreases as barrel length increases also. velocity loss per inch of barrel