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.400 H&H Magnum
The .400 H&H Magnum also known as the .400 Holland & Holland Belted Rimless or the .400 Holland & Holland Magnum is a .411 caliber belted rimless bottlenecked cartridge introduced in 2003 by Holland & Holland together with the .465 H&H Magnum in 2003. It is based on the .375 H&H Magnum case.
==General Information==
The cartridge owes its development to hunters requesting Holland & Holland to develop a cartridge which would have increased power over the .375 H&H Magnum. The project was undertaken by Russell Wilkin, the technical director for Holland & Holland. The result was two cartridges: the .400 H&H Magnum and the .465 H&H magnum. The cartridge was launched in 2003 to the public in 2003 in the UK and Europe and became available in North America in 2008. It follows in a long line of illustrious big bore cartridges introduced by Holland & Holland, the last of which was the .700 Nitro Express.
The .400 H&H Magnum is a modern rifle cartridge designed for the hunting large and dangerous game animals. The cartridge would be legal in countries which require a .400 minimum caliber for the hunting of dangerous game.〔 It was engineered to provide dependable reliability in a tropical environment. The gradual tapering and moderate shoulder of the cartridge provides for reliable feeding and extraction of the cartridge.
Specifications of interest to reloaders include a standard magnum rim diameter of .532". Overall case length is 2.85" (the same as the .375 case), and the cartridge overall length is 3.50". Bullet diameter is .411" and factory loaded bullets are to be supplied by Woodleigh of Australia. These will be the same 400 grain Premium solid and Weldcore soft point bullets sold to reloaders and used in .450/400 NE factory loads. In addition, Hornady offers a 300 grain .411" Interlock bullet to reloaders. This bullet is intended for the .405 Winchester, and with moderate reloads it should be quite suitable for North American CXP3 game in the .400 H&H. And one could probably use .410" jacketed pistol bullets intended for the .41 Magnum revolver cartridge for low velocity, low recoil practice loads.
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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