| 12 mm caliber | |
|---|---|
 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.
- Length refers to the cartridge case length.
- OAL refers to the overall length of the cartridge.
- Bullet refers to the diameter of the bullet.
Some measurements are in millimetres, while others are measured in inches.