Union of Soviet Socialist Republics
320px-Three 20x138B shells and 37 mm shell

Three 20×138B cartridges and a 37 mm shell.

The 20×138mmB cartridge was a type of ammunition used mainly for anti-aircraft and anti-tank weapons during World War II. The designation means the caliber was 20 mm, the length of the cartridge case was 138 mm and B indicates it was a belted case. The cartridge was also known as the Long Solothurn cartridge.

History[]

The 20×138mmB cartridge was initially created by the Swiss Solothurn company in the early 1930s.

Users[]

The 20×138mmB cartridge was used in the following weapons:

Switzerland[]

  • Solothurn anti-tank rifles: S-18/1000 and S-18/1100

Germany[]

  • FlaK 30 and FlaK 38 anti-aircraft guns
  • KwK 30 and KwK 38 vehicle-mounted weapons
  • MG C/30L aircraft gun

Italy[]

  • Anti-aircraft guns: Cannone-Mitragliera da 20/65 modello 35 (Breda) and Cannone-Mitragliera da 20/77 (Scotti)

Finland[]

  • Lahti L-39 anti-tank rifle
  • Lahti L-40 anti-aircraft gun

Poland[]

  • Nkm wz.38 FK anti-tank vehicle mounted gun