BL 10-inch Mk I – IV naval gun
| Ordnance BL 10 inch gun Mk I - IV | |
|---|---|
Mk I coast defence gun, Hong Kong Museum of Coastal Defence | |
| Type | Naval gun Coast defence gun |
| Place of origin | United Kingdom |
| Service history | |
| In service | 1885 - 1913 |
| Used by | Royal Navy |
| Production history | |
| Variants | Mk I, II, III, IV |
| Specifications | |
| Mass | Mk I : 32 tons barrel & breech Mks II - IV : 29 tons |
| Barrel length | Mk I : 317.5 inches (8,064 mm) (31.75 calibres) Mks II - IV : 320 inches (8,128 mm) (32 calibres) |
| Shell | 500 pounds (226.8 kg) |
| Calibre | 10-inch (254.0 mm) |
| Muzzle velocity | 2,040 feet per second (622 m/s) |
| Maximum firing range | 10,000 yards (9,100 m) |
The BL 10 inch guns Mks I, II, III, IV were British rifled breechloading 32-calibre naval and coast defence guns in service from 1885.