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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.
Alternatively, specialized firearms and ammunition may be used to optimize total subsonic ammunition effectiveness. These are designed from the start as dedicated subsonic projectile systems. Some examples include .300 Whisper , 300 AAC Blackout , .338 Whisper , 8.6mm Blackout , 9×39mm , 12.7×55mm STs-130 , .500 Whisper , and .510 Whisper .
Black Hills is popular among Cowboy Action Shooters (see SASS, the Single Action Shooting Society) because they produce ammunition in a number of obsolete calibers, such as .44 Russian, .38 Long Colt, .44-40 and others. [3] The exclusive distributor for Black Hills Ammunition in the United Kingdom is Edgar Brothers. [4]
The Whisper family of firearm cartridges is a group of wildcat cartridges developed in the early 1990s by J.D. Jones at SSK Industries.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.
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.
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.
BHOD was renamed "Black Hills Army Depot" (BHAD) in 1962. [1] Over the years, BHOD was used for storage and testing of chemical weapons, including sarin [4] and mustard gas. [5] Additionally, during World War II, the site also held Italian prisoners of war. [3] The Depot was closed on June 30, 1967, and the Igloo community was abandoned. [1]
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]