Which cartridge did John Browning design that has a rim that is the same in diameter as the .50 GI?
.50 GI The .50 GI (12.7×23mmRB) pistol cartridge was developed by Vic Tibbets and Alex Zimmermann of Guncrafter Industries. The .50 GI was introduced at the 2004 SHOT Show alongside the Guncrafter Industries Model No. 1, a variation of the M1911. The round has a rebated rim that is the same diameter as that of the .45 ACP.
.33-40 Pope The .33-40 Pope is a wildcat cartridge designed around 1900 by Harry Pope, a noted rifleman. The cartridge is a necked up .32-40 Ballard. It was Pope's favorite wildcat, and was often used with great success by him.