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.32 NAA
The .32 NAA is a cartridge/firearm 'system' designed and developed by the partnership of North American Arms and Corbon Ammunition. The cartridge is a .380 ACP case necked-down to hold a .32 caliber bullet with the goal of improved ballistic performance over the .32 ACP.
==History and Design==
Bottleneck handgun cartridge designs experienced early success and have had continuing development since at least the 7.65x25mm Borchardt or earlier, which led to the development of the 7.63x25 Mauser (also known as the .30 Mauser), followed by the 7.62x25 Tokarev. The benefits of bottleneck designs include smooth feeding and chambering and simple, robust headspacing.
The .32 NAA uses the .312" diameter bullet of the .32 S&W, .32 S&W Long, .32 H&R Magnum, and .327 Federal Magnum, and .32 ACP.
The .32 NAA is the most recent of a line of commercial bottleneck handgun cartridges. Renewed western interest in bottleneck handgun cartridges began with the .357 SIG in 1994 (necking a .40 S&W case down to a .355 bullet); followed by the .400 Corbon in 1996 (necking a .45 ACP case down to hold a .40 cal. bullet); and then the .25 NAA in 1999 (necking a .32 ACP case down to hold a .25 caliber bullet).
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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