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The measurement .303 inches (7.7 mm) is the nominal size of the bore measured between the lands which follows the older black powder nomenclature. Measured between the grooves, the nominal size of the bore is .311 inches (7.9 mm). Bores for many .303 military surplus rifles are often found ranging from around .309 to .318 inches (7.8–8.1 mm ...
The 303-cubic-inch (5.0 L) engine had hydraulic lifters, an oversquare bore:stroke ratio, a counterweighted forged crankshaft, aluminum pistons, floating wristpins, and a dual-plane intake manifold. The 303 was produced from 1949-1953. Bore was 3.75 in (95 mm) and stroke was 3.4375 in (87.31 mm).
.303 British.303 Magnum.303 Savage.375/303 Westley Richards Accelerated Express.307 Winchester.308 Marlin Express.308 Norma Magnum.308 Winchester.308×1.5" Barnes.310 Cadet.318 Westley Richards.32 Remington.32 Winchester Self-Loading.32 Winchester Special.32-20 Winchester.32-40 Ballard.32-40 Winchester.325 Winchester Short Magnum.327 Federal Magnum
The .303 Savage is a rimmed, .30 caliber rifle cartridge developed by the Savage Arms Company in 1894 which was designed as a short (as short as the .30-30 Winchester) action cartridge for their Savage Model 1895 later 1899 hammerless lever-action rifle.
The 7.62 mm designation refers to the internal diameter of the barrel at the lands (the raised helical ridges in rifled gun barrels). The actual bullet caliber is often 7.82 mm (0.308 in), although Soviet weapons commonly use a 7.91 mm (0.311 in) bullet, as do older British (.303 British) and Japanese (7.7×58mm Arisaka) cartridges.
Originally (from 1889) Martini–Henry conversions used Metford rifled barrels (and were known as Martini–Metford rifles), which were more than suitable for the first .303 cartridges, which used black powder as a propellant but wore out very quickly when fired with cordite/nitrocellulose cartridges (introduced in 1895). In 1895, the Enfield ...