Raimey,
It wouldn't be listed as 50mm Express, instead it would be 20 bore x 50mm. The 50mm is the case length. Deutsch Metallpatronenfabrik Lorenz Karlsruhe, Baden had 20 bore Jagd-Patronen-Hulsen in 75mm 63mm and 40mm lengths. Keep in mind, I didn't verify the dimensions of the chamber and we often see old chambers that are longer than the case, but w/o a separate throat. In their catalog only cases up to 577 (which is smaller than 20bore), listed as Express.
Mike
Last edited by Der Ami; 05/13/22 07:32 PM.
