20×138mmB | ||||||||
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Three 20×138B cartridges and a 37 mm shell.
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Type | Anti-Armor/Anti-Air | |||||||
Place of origin | Switzerland | |||||||
Service history | ||||||||
Used by | Switzerland, Germany, Italy, Finland, Poland | |||||||
Wars | World War II | |||||||
Production history | ||||||||
Designed | 1930 | |||||||
Manufacturer | Swiss Solothurn | |||||||
Variants | Long Solothurn | |||||||
Specifications | ||||||||
Case type | Bottleneck, belted | |||||||
Bullet diameter | 20mm | |||||||
Case length | 137.4 mm | |||||||
Ballistic performance | ||||||||
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The 20×138mmB cartridge or Long Solothurn 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 loaded cartridge weighed 10.7 ounces (300 g).
The 20×138mmB cartridge was initially created by the Swiss Solothurn company in the early 1930s.
The 20×138mmB cartridge was used in the following weapons: