Either this, my BFR 454
Or this, my Blackhawk .45 Colt
Big bore single actions are a thing of beauty!
Pretty much just deer so I don't load the .454 all the way, but a 280gr WFNGC at 1400 fps does nicley. For the .45 Colt, probably anywhere from a 270gr hardcast to a 300gr hardcast.
The 250gr XTP does well too loaded to around 1400 fps. Recoil isn't bad at all from the BFR with a load that light.