The 7×20mm Nambu is a rimless, bottleneck handgun cartridge designed in Japan for use in the Type B or "Baby" model Nambu pistol.
[1] The cartridge is a scaled-down version of the 8×22mm Nambu used in all other Nambu pistol models.
It has a muzzle energy greater than that of the .25 ACP and closer to the .32 ACP.
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