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The .25 NAA is a pistol cartridge introduced by the North American Arms company in 2002. It was originally created for use in a smaller and lighter model of their
Guardian Guardian usually refers to: * Legal guardian, a person with the authority and duty to care for the interests of another * ''The Guardian'', a British daily newspaper (The) Guardian(s) may also refer to: Places * Guardian, West Virginia, Unit ...
pistol. Despite popular belief, the 25 NAA cartridge is not based on the 32 ACP case. It is based on a rimless version of the .32 H&R Magnum case, shortened to .745" and necked down to accept .251-inch diameter ( .25 ACP) bullets. The 32 ACP case, at only .680" long is too short for use in 25 NAA production.


History and design

The cartridge was originally conceived of and prototyped by gunwriter J.B. Wood, and called the "25/32 JBW". North American Arms and Cor-Bon Ammunition then further developed the cartridge, and the NAA Guardian .25 NAA pistol combination for production in consultation with Ed Sanow.


Introduction

The finalized cartridge and pistol were introduced at the 2004
SHOT Show The SHOT Show, which is an acronym for "Shooting, Hunting, and Outdoor Trade Show", is an American annual trade fair, trade show for the shooting sports, hunting, outdoor recreation, and firearm manufacturing industry (economics), industries. The ...
. It followed the successful introduction of two other commercial bottleneck handgun cartridges, the .357 SIG in 1994 (which necked a .40 S&W case down to accept .355 caliber bullets); and the .400 Corbon in 1996 (which necked a
.45 ACP The .45 ACP ( Automatic Colt Pistol), also known as .45 Auto, .45 Automatic, or 11.43×23mm is a rimless straight-walled handgun cartridge designed by John Moses Browning in 1904, for use in his prototype Colt semi-automatic pistol. After su ...
case down to accept .40 caliber bullets).


Performance

According to NAA's website, the .25 NAA's 35 gr bullets travel faster (1,200 f.p.s.) and hit harder (20% more energy on average) than larger, .32 ACP caliber, bullets.


See also

* .32 NAA *
5.45×18mm 5.45×18mm MPTs (7N7) is a Soviet pistol cartridge. It is chambered in the PSM pistol, OTs-23 Drotik machine pistol, and OTs-26 pistol. History and design It was designed in the Soviet Union in the early 1970s by Antonina D. Denisova at ...


References


External links

* * at NAA website Pistol and rifle cartridges Cor-Bon cartridges {{ammo-stub