20×138mmB
The 20×138mmB or Long Solothurn cartridge is a type of ammunition used mainly for anti-aircraft and anti-tank weapons during World War II. The designation means the caliber is 20 mm, the length of the cartridge case is 138 mm and B indicates it is a belted case. The loaded cartridge weighs.
History
The 20×138mmB cartridge was developed by the Waffenfabrik Solothurn, a Swiss front company of Rheinmetall in the early 1930s from a less powerful cartridge 20×105mmB cartridge.Weapon platforms
The 20×138mmB cartridge is used in the following weapons:Switzerland
Germany
- FlaK 30 and FlaK 38 single-barrel, and Flakvierling quadruple-barrel anti-aircraft guns
- KwK 30 and KwK 38 vehicle-mounted weapons
- MG C/30L aircraft gun
Italy
Finland
Poland
- Nkm wz.38 FK anti-tank vehicle-mounted gun