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Yesterday I went to the range and one of my range buddies was there with a Uberti 1875 Remington single action revolver chambered in .45 Colt. It also had an extra cylinder chambered in .45 ACP. He said he said the .45 Cowboy Special fits perfectly in the .45 ACP cylinder and he was using it to fire the .45 CS. I did not know this was possible. Is it possible? Can you fire .45 CS from a .45 ACP cylinder? I keep thinking maybe I misunderstood my friend.