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The .450 Rigby is a rifle cartridge designed in 1994 by John Rigby & Co. for the purpose of hunting large, thick-skinned dangerous African game animals. The cartridge is essentially a .416 Rigby necked up to accept a .458 in (11.6 mm) bullet, although with a higher operating pressure and much of the original taper removed.
The original military trial "long chamber" cartridge was loaded with a bullet weighing 480 grains (31 g), although for military use it was found to be awkwardly long and difficult to handle and to load, in response Eley Brothers developed the much shorter, bottlenecked .577/450 Martini–Henry cartridge.
The .450 No 2 Nitro Express is suitable for all dangerous game including elephant. In his African Rifles and Cartridges, John "Pondoro" Taylor states the .450 No 2 Nitro Express is as good as but no better than any other .450-.476 calibre Nitro Express cartridges in terms of killing power. Taylor further states there is a psychological appeal ...
The cartridge was originally designed as a deer stalking round with a 260 gr (17 g) bullet, although later a 530 gr (34 g) loading was produced for target shooting. [ 1 ] [ 2 ] The .500/450 No. 1 Nitro for Black was the same cartridge loaded with mild loadings of cordite , carefully balanced to replicate the ballistics of the black powder version.
By the time these two cartridges appeared, the early issues with the .450 Nitro Express had been resolved, and it quickly became the most popular and widely used dangerous-game hunting round. [ 2 ] Following the British Army 1907 ban of .450 caliber ammunition into India and the Sudan , instead of developing their own replacement, Rigby adopted ...
The .500/450 Nitro Express is a rimmed bottlenecked cartridge designed for use in single-shot and double rifles. It is based on the old black-powder .500/450 Magnum Black Powder Express . It fires a .458-inch (11.6 mm) 480-grain (31 g) projectile at over 2,175 feet per second (663 m/s).