57 mm x 438 HE
57x438 mm HE round
A 57 mm x 438 high-explosive round for the 57 mm L/70 Bofors antiaircraft gun, consisting of a brass cartridge case with electrical gun primer, propellant charge and an HE projectile fitted with a point-detonating fuze.
Also written: 57x438
Specification
| Calibre | 57 mm |
|---|---|
| Muzzle velocity | 1020±12 m/s |
| Maximum pressure of powder gases | 330 MPa |
| Fuze arming distance | 400 m |
| Round mass | 6100 g |
| Projectile mass | 2400±36 g |
| Operating temperature | -30 ÷ +50 °C |
All data provided for information purposes; final specification is defined per contract. Full technical data sheets are issued on request against a stated end-user.