8-inch/30-caliber gun
< 8-inch
| 8"/30 caliber Mark 1 & 2 Naval Gun | |
|---|---|
USS Boston's forward 8"/30 gun is in the right foreground, with its crew standing at their posts. | |
| Type | Naval gun |
| Place of origin | United States |
| Service history | |
| In service | 1886–1906 |
| Used by | United States Navy |
| Wars | |
| Production history | |
| Designer | Bureau of Ordnance |
| Designed | 1883 |
| Manufacturer | U.S. Naval Gun Factory |
| Produced | 1886– |
| No. built |
|
| Variants | Mark 1 Mod 0 and 1 and Mark 2 Mod 1 |
| Specifications | |
| Mass | 29,100 lb (13,200 kg) (without breech) |
| Length |
|
| Barrel length |
|
| Shell | 260 lb (120 kg) |
| Caliber | 8 in (203 mm) |
| Elevation | −5° to +20° |
| Traverse | −150° to +150° |
| Rate of fire | 0.5–1 round per minute |
| Muzzle velocity | 2,000 ft/s (610 m/s) |
| Effective firing range | 14,000 yd (13,000 m) at 20° elevation |
The 8"/30 caliber gun (spoken "eight-inch-thirty-caliber") formed the main batteries of the United States Navy's "New Navy". They were a US naval gun that first entered service in 1886, and were designed for use with the first three protected cruisers, Atlanta, Boston and Chicago.