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27 gru 2014 · 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 .308 Winchester is a smokeless powder rimless bottlenecked rifle cartridge widely used for hunting, target shooting, police, military, and personal protection applications globally. It is similar, but not identical, to the 7.62×51mm NATO cartridge.
28 mar 2024 · Dimensions. 308 Winchester: The 308 Winchester cartridge typically features a bullet diameter of .308 inches (7.82mm) and a case length of 2.015 inches (51.18mm).
27 paź 2007 · Anyone that reloads knows that in order to get 2800-2850 fps out of a 22" barrel with a 308 Win, and using the powders commonly used in military 7.62 NATO loadings (ussually 43 to 45 gr) the pressure is about 50,000 CUP or close to 60,000 psi.
19 sie 2018 · In terms of pressure differences of the .308 Winchester vs the 7.62 mm NATO, the actual numbers aren’t all that large—a 62,000 psi limit for the .308 Win. and 60,200 psi for the 7.62...
Whether you have a NATO chambered barrel (M14/M1 Garand G.I. ".308 Win."/7.62mm NATO barrels all have NATO chambers), or a .308 Winchester chamber, keep the headspace within SAAMI limits (1.630 GO, 1.634 NO GO, 1.638 FIELD REJECT).
29 lip 2021 · The answer may surprise you. With a barrel reduction from 28″ to 16.5″, the average speed loss of the four types of .308 ammo was 261 fps total. That works out to an average loss of 22.7 fps per inch. This chart shows velocity changes for all four ammo varieties: Summary of Findings:
