12 mm caliber | |
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![]() Example of a 12 mm cartridge, a .50 Action Express (left) next to a .32 ACP for comparison | |
Firearm cartridges |
This is a list of firearm cartridges which have bullets in the 12 millimetres (0.47 in) to 12.99 millimetres (0.511 in) caliber range.
Some measurements are in millimetres, while others are measured in inches.