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The 6.8mm Remington Special Purpose Cartridge (6.8 SPC, 6.8 SPC II or 6.8×43mm) is a rimless bottlenecked intermediate rifle cartridge that was developed by Remington Arms in collaboration with members of the U.S. Army Marksmanship Unit and United States Special Operations Command [6] to possibly replace the 5.56 NATO cartridge in short barreled rifles (SBR) and carbines.
To increase powder capacity, the shoulder is located higher than the 6.8, and the case is longer. The neck is sized for .224 caliber bullets. 224 Valkyrie : Uses 6.8 SPC cases, trimmed shorter, and the shoulder re-formed at a lower location due to being designed for using relatively long "high BC" (Ballistic Coefficient) bullets. The neck is ...
Commercially, reduced-power .277 Fury Elite ball FMJ ammunition using non-hybrid conventional cartridge cases is offered, that fires a 135 grains (8.7 g) projectile with a G1 ballistic coefficient of ≈ .475 at a muzzle velocity of 2,750 feet per second (838 m/s) from a 16-inch (406 mm) barrel.
In 1925, Winchester introduced the .270 Winchester, previously known as the .270 WCF, based on the 30-03 Springfield case necked down to .277" (6.8 mm). Although the .270 Winchester was not an instant success, within a few decades it became one of the most popular big game hunting cartridges for mid sized game worldwide, because of its relatively mild recoil and flat trajectory within ...
.500 Black Powder Express.500 Jeffery.500 Nitro Express.500 S&W.500 Bushwhacker.500/450 Magnum Black Powder Express.502 Thunder Sabre.505/.404 Stewart.510 Beck.577/450 Martini–Henry.577/500 Nitro Express.577/500 No 2 Black Powder Express.505 Gibbs.510 DTC Europ.510 Whisper.55 Boys.56-56 Spencer.575 Miller & Greiss; 20/577 Alexander Henry
Loaded ammunition in the 300 BLK caliber can be purchased as light as 100 gr, with the 125 gr class of bullets proving to be popular when shooting at higher velocities. However, to use a bullet that has a weight near 125 gr at supersonic velocities, the .277 caliber has a much more ideal shape for stability and accuracy (longer and slimmer ...
The first French brass cartridge for military use. Black powder. [3] Replaced by 8mm Lebel. [3] 11×60mm Mauser: 1871 Germany R 11×60mmR 1430 [3] 2013 [8] 2.815 77 [3] 0.446 [3] 60mm The first black powder cartridge adopted in large numbers by the unified German Army, it was used in the 1871 and 1871/84 rifles. 11×60mm Murata: 1880 Japan R 11 ...
Cartridges like the American 5.56×45mm M193 (1964; originally used in the M16), Soviet 5.45×39mm M74 (1974; used in the AK-74, which replaced the AKM), Belgian SS109 / 5.56×45mm NATO (1980; used in most AR-15 systems), and the Chinese 5.8×42mm (1987; used in the QBZ-95) allow a soldier to carry more ammunition for the same weight compared ...