381mm / 50 Model 1934 naval gun

The 381 mm/50 Ansaldo was the main battery gun of Italy's most modern battleships: Vittorio Veneto, Littorio, and Roma. These built-up guns consisted of a liner, a cylinder over the chamber and part of the rifle bore, a full length cylinder, and a 3/4 length jacket with a hydro-pneumatically operated side-swinging Welin breech block. Each battleship carried nine guns mounted in three 1595-tonne triple turrets with maximum elevation of 35°. Time between salvos was approximately 45 seconds.

Ammunition
The charge was contained in six cloth bags. Each bag contained 45 kg (100 lb) of smokeless powder. High explosive (HE) shells weighed only 774 kg. Anticipated useful barrel life was approximately 120  effective full charges (EFC).

Weapons of comparable role, performance and era

 * 380 mm/45 Modèle 1935 gun : French equivalent
 * 38 cm SK C/34 naval gun : German equivalent