Mine shell

A mine shell (from , ), or high capacity high-explosive (HCHE) in British military nomenclature, is a military explosive shell type characterized by thin (usually steel) shell walls which allow a much higher explosive content than standard high-explosive shells of the same caliber, trading a higher pressure wave effect against high-explosive shells' larger fragmentation effect and better penetration of armoured targets. Mine shells were originally developed during the mid- to late 1800s against fortresses before the introduction of rebar; reinforced fortresses had made the original use of the type obsolete around World War I, but they were given a new role against aircraft during World War II.

A mine shell (from , ), or high capacity high-explosive (HCHE) in British military nomenclature, is a military explosive shell type characterized by thin (usually steel) shell walls which allow a much higher explosive content than standard high-explosive shells of the same caliber, trading a higher pressure wave effect against high-explosive shells' larger fragmentation effect and better penetration of armoured targets. Mine shells were originally developed during the mid- to late 1800s against fortresses before the introduction of rebar; reinforced fortresses had made the original use of the type obsolete around World War I, but they were given a new role against aircraft during World War II. File:30mm ADEN Mk 4 cannon-IMG 6280-white (cropped).jpg|British 30 mm ADEN cannon, developed from the German Mauser MG 213 to fire mine shells. File:Canon DEFA MG 1359.jpg|French 30 mm DEFA cannon, , developed from the German Mauser MG 213 to fire mine shells. Some WW2 mine shell payloads were significantly larger than modern equivalents. The payload PGU-13/B HEI round for the GAU-8/A Avenger gun of the A-10 Warthog and the payload 30 mm OFZ shell of Russian GSh-30-1 and GSh-30-6 cannons are lower than the payload of German WW2 mine shells of the same caliber. Sweden, having experience with the shell type from earlier, developed several different mine shells in different calibers after the war, including mine shell variants for the 20 x 110 Hispano cartridge and the 57 x 230R Bofors cartridge. Mine shells are still used today in autocannons such as the Mauser BK-27, but not by artillery.

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