.32 NAA

Cartridge Data Published On: December 20, 2014 at 11:36 pm by Bullet-Blog and last updated on February 12, 2015 at 11:24 am


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The .32 NAA is a Center Fire cartridge with a Bullet Diameter of 0.3129 in” (7.95mm) that is primarily used in Pistols. The .32 NAA originated in The United States in 2002. The .32 NAA also has a case length of 0.68 in” (17.27mm) and an overall length of 0.984 in” (24.99mm).


The .32 NAA, also known as the .32 North American Arms, is a pistol cartridge developed in the United States as by North American Arms as part of a weapons system and was later offered in the NAA Guardian Mini-Pistol. The .32 NAA cartridge is a .380 ACP pistol cartridge necked down to accept a .32 caliber projectile. Currently the cartridge is manufactured by CorBon and is offered in loadings of around 60-80 grain projectiles with velocities upward of 1000-1200 fps depending on the load selected, making it a step more powerful than the rival .32 ACP cartridge, due to the bottleneck design. The .32 NAA is also currently offered through Hornady in their Critical Defense line.

In terms of power, the .32 NAA is at the high end of the spectrum for both velocity and muzzle energy for a .32 caliber cartridge. The cartridge outperforms both the .32 S&W (by a lot) and the .32 ACP cartridges. With the standard 60 grain projectile, you can expect muzzle energies around 200 ft-lbs, making it the highest end of .32 caliber auto cartridges, but still falling short of magnum revolver cartridges such as the .32 H&R Magnum or the .327 Federal Magnum, which produce similar velocities but with larger and heavier projectiles and significantly more muzzle energy, which is to be expected.

Cartridge Details

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  • 2002
  • The United States
  • Rimless, Bottleneck
  • Pistols
  • 0.3129 in” (7.95mm)
  • 0.3365 in” (8.55mm)
  • 0.3729 in” (9.47mm)
  • 0.374 in” (9.5mm)
  • 0.374 in” (9.5mm)
  • 0.05 in” (1.14mm)
  • 0.68 in” (17.27mm)
  • 0.984 in” (24.99mm)
  • 10.5 gr H20 (0.68 cm3)
  • Center Fire (Small Pistol)
  • 23900 psi (165 MPa)
  • 177 MPa (25672 psi)
  • ~230 MPa (33373 psi)

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