Speaking of the 8 x 50R cartridge, I just finished reading Kalman Kittenberger's "Big Game Hunting and Collecting in East Africa, 1903-1926", and he keeps referring to his 8mm Mannlicher and how terrible the Austrian made ammunition was. The multiple stories of this rifle jamming on him while he was being charged are pretty hair raising. Would this be the same 8 x 50 R cartridge that the Lee Speed was chambered for?