| Answer | Crossword Clue |
|---|---|
| BORE | Barrel diameter |
| BORE | Gun barrel diameter |
| BORE | Gun-barrel diameter |
| caliber | the diameter of a gun barrel, also CALIBRE |
| calibre | the diameter of a gun barrel, also CALIBER |
| calibers | The internal diameter or bore of a gun barrel |
| calibers | CALIBER, the diameter of a gun barrel, also CALIBRE |
| calibres | The internal diameter or bore of a gun barrel |
| calibres | CALIBRE, the diameter of a gun barrel, also CALIBER |
