Could somebody explain the 45 colt short case round, that has a 45 Colt headstamp?
Around WW I the Union Metallic Cartridge Co. tried to consolidate both round, the .45 Colt and .45 S&W into one round, using the .45 S&W case and the 250 gr. bullet of the .45 Colt. That went over like a lead balloon. But it did give rise to the term "Long Colt."
And Colt prevailed upon the Peters Cartridge Co. to make the .45 Colt Govt. to avoid stamping the caliber ".45 S&W" on their revovlers.