While perusing the internet recently I came across a small bit of information concerning an USSR experimental 20x110mm cartridge from the 1930s for an aircraft mounted machine gun/cannon.
Information is from http://www.airwar.ru/weapon/guns/dshak.html (open in Google Chrome & use the translator)-
Quote from the above webpage:
“At the beginning of 1936, an analogue of the Oerlikon cartridge 20x110 was developed at the Tula Cartridge Plant with a classic sleeve without flange and a projectile mass of 128 grams.”
Note “sleeve” = cartridge case
Soviet 20x110mm cartridge for the DSHAK gun shown below.
Further information can be found at the website listed above.
Corrections, additions & discussion are most welcomed.