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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 .450 Watts Magnum was designed by Watts and Anderson of Washington State. The .450 Watts Magnum is similar to the .458 Lott with the exception of case length which is 2.850-inch (72.4 mm). [1] While the case capacity is slightly more than that of the Lott cartridge, the maximum overall cartridge length is the same.
Whilst Eley developed the completely new, mammoth .450 No 2 Nitro Express, Holland & Holland followed Rigby's example and loaded the old black powder.500/450 Magnum Black Powder Express with cordite, creating the .500/450 Nitro Express. The larger case capacity allowed the same ballistics at reduced chamber pressures to the .450 Nitro Express.
.450 Nitro Express also known as the .450 Nitro Express 3 1 ⁄ 4-inch is a rifle cartridge designed for hunting dangerous game such as elephant, rhino, cape buffalo, lion, and leopard. This cartridge is used almost exclusively in double rifles for hunting in the tropics or hot climates in general and is associated with the Golden Age of ...
Compared to the more popular .458 Winchester Magnum and the .458 Lott, the .460 Weatherby Magnum provides a flatter trajectory, dropping less than 10-inch (25 cm) at 300-yard (270 m) when sighted in at 200-yard (180 m) with the 450 gr. Barnes TSX Weatherby ammunition.
By way of comparison, the .416 Rigby and .416 Remington Magnum cartridges fire .416 in (10.57 mm) bullets of 400 gr (26 g) at 2,400 feet per second (730 m/s) with a muzzle energy of approximately 5,000 foot-pounds force (6,800 N⋅m). These cartridges exceed the ballistic performance of the .404 Jeffery but at the price of greater recoil and ...
The .416 Weatherby Magnum uses a slighter more voluminous case than the Rigby cartridge and works at a higher C.I.P. pressure than the .416 Remington Magnum. The .416 Dakota uses a modified Rigby case and is able to attain 2,600 ft/s (790 m/s) using better quality brass than the Rigby cartridge at a higher pressure.
The unveiling of the .450 Nitro Express by John Rigby & Company in 1898 heralded the beginning of the modern big-game cartridge. Created from loading the already popular .450 Black Powder Express with cordite, the .450 NE was a fast and accurate cartridge capable of taking all African and Indian dangerous game.