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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.
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.
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
375 Stalker, Standard military 7.62x51 cases (also .308), length is trimmed, shoulder is reformed, neck is expanded to .375 375 SOCOM, Proprietary. The case head and rim dimensions exactly match the military 7.62x51 (also .308), however, the case body is slightly wider and has more taper. 400 AR, Wildcat. The parent is the 7.35×51mm Carcano ...
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 ...
.338 Federal (.308 Winchester).408 Cheyenne Tactical.300 Winchester Magnum.338 Lapua Magnum 6.5×47mm Lapua 6.5-284 Norma.40 Lobaev Whisper.375 Cheyenne Tactical 2010–present SVL variant chambered for .408 Cheyenne Tactical is used by the Federal Protective Service of Russia. [7] Other variants include OVL, SVLK-14S, SVLK-14M, DXL, TSVL and DVL.
Of course the silent, subsonic loads should be loaded below the speed of sound with preferably the heaviest and longest bullet the .338 calibre has to offer. Currently this is the 300-grain (19 g) Berger Hybrid Open Tip Match (OTM) with a BC of 0.818 and a length of 1.820 inches (46.2 mm).
The .308 Winchester has a 3.64 mL (56 gr H 2 O) cartridge case capacity. [9] The exterior shape of the case was designed to promote reliable case feeding and extraction in bolt-action rifles and machine guns alike, under extreme conditions. .308 Winchester maximum C.I.P. cartridge dimensions. All dimensions in millimeters (mm) and inches.