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As .505 Gibbs was intended for hunting dangerous game in tropical environments, and due to the temperature sensitivity of cordite, the lower pressures provide a greater safety and reliability margin. The .505 Gibbs has a unique bullet diameter of .505 in (12.8 mm) while most other .50 caliber bullets have diameters of .510 in (13.0 mm).
To shoehorn a large round into the 98 action required a rebated rim. When introduced, the .500 Jeffery was technically rated as the most powerful rifle cartridge although in reality not quite up to .505 Gibbs' performance. The .505 Gibbs, with greater capacity, can be loaded far in excess of the .500 Jeffery today.
The cartridge is standardized by the C.I.P. and is also known as .404 Rimless Nitro Express. [6] It was designed in 1905 by London based gunmaker W.J. Jeffery & Co to duplicate the performance of the .450/400 Nitro Express 3-inch in bolt-action rifles. [ 7 ]
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.
The .500 Nitro Express / 13x76mmR is a rifle cartridge designed for hunting large and dangerous game animals in Africa and India. [1] This cartridge was primarily designed for use in double rifles though various single shots were produced on the Farquarson action and at least one major company (Heym) produced it in bolt-action configuration.
Inventing Accuracy: A Historical Sociology of Nuclear Missile Guidance. Cambridge, Massachusetts: MIT Press. ISBN 978-0-262-13258-9. Spall, James C.; Maryak, John L. (1992). "A Feasible Bayesian Estimator of Quantiles for Projectile Accuracy from Non-iid Data". Journal of the American Statistical Association. 87 (419): 676– 681.
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The recoil of the .460 Weatherby Magnum presents a problem for many shooters when shooting a cartridge of this size. Even with a 12 lb (5.4 kg) rifle (scope, base, rings and cartridges included) the recoil against the shooter's shoulder is measured at 100 ft⋅lbf (140 J).