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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.
The rebated rim dimensions exactly match the 6.8mm Remington SPC case, allowing the use of the 6.8mm SPC bolt-face of an AR-15, but the case has a base diameter of .4400" and cannot be reformed from any other existing case. The 400 LGND uses .4005" jacketed rifle bullets. 450 Bushmaster : Uses .284 Winchester cases. Cut the length to 1.700" to ...
.22 BR Remington.22 Eargesplitten Loudenboomer.22 PPC.22 Remington Jet.22 Spitfire.22 WCF.220 Russian.220 Rook.220 Swift.221 Remington Fireball.22 Nosler.22-250 Remington.222 Remington.222 Remington Magnum.222 Rimmed.223 Remington.223 Winchester Super Short Magnum.224 Voboril.224 Boz.224 Weatherby Magnum.224 Valkyrie.225 Winchester.297/230 Morris
The military designation for this round is 6.8 common cartridge. [5] The XM1186 is the general-purpose 6.8 mm round, with other versions including reduced range rounds so weapons chambered in 6.8 mm can fire on existing ranges designed for the 5.56 mm, marking rounds for force-on-force shooting, and blank and tracer rounds. [26]
6×57mm Mauser 1895 Germany R 6×57mm 2600 0.236 57mm aka 6.2×57mm RWS. Necked down 6.5×57mm. The 6mm Remington is a carbon copy. 6×62mm Freres 1983 Germany 1 R 6×62mm 3460 2260 0.243 62mm also 6×62mmR, based on 9.3×62mm case. 6mm Lee Navy: 1895 US 0 R 6×60mmSR 2560 1629 0.236 60mm
From 8 mm caliber upwards the rise of sectional density and penetrating capability of practical spin-stabilized rifle bullets (bullets up to 5 to 5.5 calibers in length) tends to flatten out. [7] This means that, loaded with light, short and soft-nosed 8 mm bullets, the 8mm Remington Magnum can be used on remarkably small game.
A popular 7 mm hunting caliber bullet is actually .283 in diameter (7.2 mm), but wildcat cartridges using this caliber bullet in a 5.56 x 45 case have so far not been successful. There is an existing and well-developed use of hunting-rifle bullets in the .277 caliber (6.8 mm), introduced by Winchester as the 270 in 1925.
6.45×48mm XPL Swiss cartridge of the experimental W+F Bern C42 assault rifle used in the WEIZE (Weiche Ziele, lit. "soft target") program; 6.5×39mm cartridge based on the 7.62×39mm of variants of the AR-15 and Zastava M70 assault rifles; 6.8mm Remington SPC (6.8×43mm) cartridge of the limited service LWRC M6 assault rifle