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.450 No 2 Nitro Express
The .450 No 2 Nitro Express also known as the .450 Nitro Express 3½-inch was developed by Eley Brothers in 1903.
==Development==
Following early extraction problems encountered with the .450 Nitro Express created by John Rigby & Company, Eley decided to create their own cartridge and release it to the market, allowing all rifle makers to chamber weapons for their round. This was unusual for an ammunition maker, as most cartridges of the period were designed by rifle makers.〔Wieland.〕
The .450 No 2 NE, so named to differentiate it from the original, was a completely original design, long and massive it featured a thicker rim, heavier walls and a large internal volume which kept pressures to minimum, making it almost immune to case-sticking.〔
Following the British Army 1907 ban of .450 caliber ammunition into India and the Sudan, Eley developed the .475 No. 2 Nitro Express by necking up the .450 No 2 Nitro Express.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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