Webley .455
I have an original .455 round marked COLT .455, as Colt did chamber the peacemaker for Webley .455. But, their ammo renamed it COLT .455. It will chamber in any of my .45 colt guns, But as someone already meantioned, the rim is at least half as wide as .45 colt ammo. I'm not ever going to try firing it, but it slides right in and is about as long as a .45 Schofield round. I think Fioochi makes a .455 round. One thing that always confused me - the webley .476 and the webley .455 were interchangable. what's the deal with that? I know the British had different methods of measuring their rounds.