380mm

The designation "380mm" most commonly refers to a specific caliber, which is the internal diameter of a firearm's barrel. This measurement is typically expressed in millimeters. Calibers of this size are generally found in artillery pieces and, historically, in large naval guns.

One prominent example of a 380mm caliber weapon is the German 38 cm SK C/34 naval gun. This heavy-duty cannon was mounted on several German warships during World War II, most notably the Bismarck-class battleships and the Admiral Hipper-class heavy cruisers. These guns were capable of firing large, heavy shells over significant distances, making them formidable offensive weapons.

The 380mm caliber is considerably larger than typical rifle or pistol calibers, indicating a weapon designed for impact and destruction rather than rapid fire. Weapons of this size require substantial engineering for recoil management, ammunition handling, and structural integrity. While less common today in naval warfare due to the evolution of naval technology, the 380mm caliber represents a significant historical point in the development of large-caliber ordnance.