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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 suppressed.
Subsonic ammunition is ammunition 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.
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 loads are often designed to avoid the turbulent transonic zone (~900ft/s - 1350ft/s or 0.8 to 1.2 mach) entirely. This allows the firearm to be suppressed relatively easily. To ensure terminal performance at subsonic velocities, heavy bullets for the caliber (250–300 grains (16–19 g)) are desirable. Of course the silent, subsonic ...
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.
The RPR was originally announced in the following calibers and configurations: .308 Win. with 1:10 twist, 20 in (51 cm) barrel, weighing 9.7 lb (4.4 kg) 6.5 Creedmoor with a 1:8 twist, 24 in (61 cm) barrel, weighing 10.6 lb (4.8 kg)
Reviewers on Amazon stood just as firmly behind the 10-Day Challenge as its celebrity fans have, with one person claiming that he "lost 12 lbs. in the first 10 days, a total of 21 lbs. in the ...
The .22 Accelerator is a special loading of the .30-30, .308, and .30-06 cartridges that is manufactured by Remington. [1] Description