30 Mauser) cartridge. The Type 14 Nambu entered production ... These ballistics put the 8mm Nambu round roughly on par with the .380 ACP round (which has an 0.355 inch diameter).

30 Mauser) cartridge. Type 14 8mm Japanese Nambu History & Specifications The Type 14 Nambu entered production in 1926, an updated version of the Type A Nambu pistol developed in 1902 by ...