From what I can find, looking at US shotshell offerings from 1940, the short 12's (actually 2 5/8") carried a maximum shot charge of 1 1/8 oz. My "Eley Shooter's Diary 2005" does show the Eley Maximum 2 1/2" shell with a shot charge of 1 3/16 oz.

Last edited by L. Brown; 11/08/19 08:35 AM.