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.400 Corbon
The .400 Corbon is an automatic pistol cartridge developed by Cor-Bon in 1997.〔(Corbon Catalog p.2 )〕 It was created to mimic the ballistics of the powerful 10 mm Auto cartridge by means of a .45 ACP case, necked down to with a 25-degree shoulder.
==History and Design==
Peter Pi, founder of Cor-Bon and the designer of the cartridge, explained his reason for developing the cartridge: "Velocity is the key to making hollowpoint bullets work. The added velocity assures that the hollowpoint will open up even if plugged with material. This reduces the risk of overpenetration and allows the action of the hollowpoint bullet to dump the available energy into the target."〔(''The 10mm Auto Cartridge'', "Part 5: 10mm "Offspring" and "Stepchildren," quoting an expired Cor-bon webpage, retrieved July 5, 2008 )〕
Mr. Pi said because he wanted the .400 Corbon to be easy for handloaders to make, he based the cartridge on the ubiquitous .45 ACP so that an ample supply of cases were readily available, gave the shoulder a 25-degree angle, and headspaced it on the case shoulder rather than the mouth so that over-all-length is not critical and the bullet can take a tight roll crimp to avoid setback and to get a more efficient powder burn.〔〔(''GUNS Magazine'', "Storm from the East," by Clair Rees (1999), retrieved from Bnet on July 5, 2008 )〕
The .400 Corbon followed the introduction of the .357 SIG in 1994, which was essentially a copy of the 9mm Action Express without the rebated rim.
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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