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The .284 Winchester (7.21x55mmRB) is a rebated rim rifle cartridge introduced by the Winchester Repeating Arms Company in 1963.. The .284 Winchester was designed to duplicate the performance of the .270 Winchester and .280 Remington cartridges from the new Winchester Model 100 autoloader and Winchester Model 88 lever-action rifles.
450 Bushmaster : Uses .284 Winchester cases. Cut the length to 1.700" to form a straight-wall cartridge, from 2.170". The .284 Winchester case is very similar to the .308, however, the .284 case has a body diameter of 0.500", and the .308 case has a body diameter of 0.471". Both share an identical head/rim.
The ammunition was bulk-packed in standard 20-round cartons without stripper clips to maximize the amounts delivered and the packaging was marked in the Chinese language. In 1944 there was a contract to make 30-million modified Springfield-type Mauser-compatible stripper clips which were bulk-packed in ammo cans. Due to the long transport times ...
The parent case .284 Winchester was created around 1963, but did not see extensive commercial use. The 6.5 caliber allowed for the use of long, aerodynamic bullets. In 1999, Norma submitted it to CIP. It has since been standardized as the 6.5mm-284 Norma.
.307 Winchester: rifle cartridge United States of America: Q4545255.308 Marlin Express: Firearm cartridge United States of America: Q158724.308 Norma Magnum: cartridge Sweden: Q2005795.308 Winchester: cartridge United States of America: Q15964368.308×1.5-inch Barnes: wildcat cartridge based on the .308 Winchester Q4545260.310 Cadet: cartridge ...
The heaviest commercially loaded ammo available for the 7mm is 195 grains, [6] while the .30-06 Springfield can be loaded with bullets up to 220 grains, but for a .308 caliber to equal the flat trajectory and penetration of a .284 diameter 180-grain bullet with a muzzle velocity of 2,860 ft/sec (870 m/s), as offered for the 7mm Remington Magnum ...
The .264 Winchester Magnum is a belted, ... (.284") 150 to 175 grain spitzer-shaped projectiles on big game, as compared to 140 grains being the upper end of pointed ...
An overview of 7mm caliber cartridges, their history, and uses in firearms.