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Subsonic ammunitions are ammunitions designed to operate at velocities below the speed of sound (Mach 1), which at standard conditions is 340.29 m/s (1,116.4 ft/s). This avoids the supersonic shockwave or "crack" of a supersonic bullet, which, particularly for suppressed firearms, influences the loudness of the shot.
For example, if the muzzle velocity is reduced from 2,700 ft/s (820 m/s) (common for the .308 Winchester, for example) to a subsonic 950 ft/s (290 m/s), the muzzle energy is reduced by a factor of 8. Military marksmen and police units may use subsonic ammunition in suppressed rifles when minimal noise is more important than range and energy. [58]
The Whisper family was developed as a line of accurate, multi-purpose cartridges using relatively heavy rifle bullets for a given caliber in subsonic loads. [ 1 ] [ 2 ] [ 3 ] The intention was to create an extremely accurate cartridge family for military, police, competition and specialized hunting markets that could also be easily sound ...
The DSR-1 Subsonic is a variant optimized for 7.62×51mm NATO/.308 Winchester subsonic ammunition usage. The barrel length is reduced to 310 mm. The barrel length is reduced to 310 mm. The 8 inch twist rate of the barrel is especially adapted to stabilize the long heavy projectiles used in subsonic ammunition.
Walmart has announced it is returning guns and ammo to sales floors in all of its United States locations, backtracking on a decision earlier this week requiring they be stored in a secure room ...
.308 Winchester: the commercial name of a centerfire cartridge based on the military 7.62×51 mm NATO round. Two years prior to the NATO adoption of the 7.62×51 mm NATO T65 in 1954, Winchester (a subsidiary of the Olin Corporation) branded the round and introduced it to the commercial hunting market as the .308 Winchester.
7.62mm Thumper is a barrel specification optimized to run larger bullets out of standard 7.62×39mm cases. [1] Barrels are cut to a standard 7.62×39mm "Russian" chamber but the bore ideally uses a faster 1:8" rifling twist rate in order to stabilize bullets heavier than 200gr at subsonic speeds. [2]
Mar. 11—WILKES-BARRE — Pennsylvania American Water on Monday announced the start of a $4.3 million project to replace more than 14,500 feet of water main in the city of Wilkes-Barre The water ...