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The .303 British (designated as the 303 British by the C.I.P. [2] and SAAMI [3]) or 7.7×56mmR, is a .303-inch (7.7 mm) calibre rimmed tapered bottleneck centerfire rifle cartridge. The .303 inch bore diameter is measured between rifling lands as is the common practice in Europe which follows the traditional black powder convention.
The .303/25, sometimes known as the .25/303 is a wildcat centrefire rifle cartridge, based on the .303 British, necked down to fire a .257 projectile, originating in Australia in the 1940s as a cartridge for sporterised rifles, particularly on the Lee–Enfield action; similar versions also appeared in Canada around the same time.
.280 British.280 Jeffery.280 Flanged.300 Rook.300 Sherwood.300 H&H Magnum.303 British.303 Magnum.375/303 Westley Richards Accelerated Express.310 Cadet.318 Westley Richards.333 Jeffery.338 Lapua Magnum.350 Rigby.400/350 Nitro Express.400/360 Nitro Express.360 No. 5 Rook.360 No. 2 Nitro Express.369 Nitro Express.375 Flanged Nitro Express
The .303/22, sometimes known as the .22/303, is a wildcat centrefire rifle cartridge based on the .303 British, necked down to fire a .224 projectile, originating in Australia in the 1930s as a cartridge for sporterised rifles, particularly on the Lee–Enfield action. Similar versions also appeared in Canada around the same time. [3]
The civilian headstamp has the "SBR" at 12 o'clock and the caliber at 6 o'clock. On the military headstamp the "SB" is at 12 o'clock and the "R" is at 6 o'clock. It manufactured 7,92mm Mauser and .303 British military ammunition because most of the regional powers used either captured German or Austrian war surplus or British military aid.
An intermediate cartridge is a rifle/carbine cartridge that has significantly greater power than a pistol cartridge but still has a reduced muzzle energy compared to fully powered cartridges (such as the .303 British, 7.62×54mmR, 7.65×53mm Mauser, 7.92×57mm Mauser, 7.7×58mm Arisaka, .30-06 Springfield, or 7.62×51mm NATO), and therefore is ...
Poison Profits. A HuffPost / WNYC investigation into lead contamination in New York City
Olin subsidiaries began manufacturing ball powder specification WC846 for .303 British ammunition during World War II. Hodgdon Powder Company salvaged 80 tons of WC846 propellant from disassembled .303 British military rifle cartridges in 1949 and sold the propellant to handloading civilians as BL type C.