.284 Winchester

Common card · No. 274694

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. The result was a 7 mm cartridge of comparable overall length to the .308 Winchester with greater case capacity and power potential. .284 Winchester has enjoyed a resurgence due to interest from long-range competitive shooters. Winchester has continued to produce brass cases for this cartridge since 1963.

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