RR,
When I was 16.. My brother came home on leave from the Navy.. He brought me a C&B pistol, that he got from someone on his base < they shot it once and hated cleaning it! > Mine always like the .454's, so that is what I use? .457's were a bear to load and I never could find any .451's in my area at the time.< 28 odd yrs ago in SE KS > back then I never knew anyone like a Dixie GW, Dixon's, Log Cabin shop or the like was around :redface: Just dug up anything I could to read up on them and went at it!!
My advice, get some of each and see what your gun likes :hmm: usually the gun will tell you what it preferes..
BYW my CVA .36 C&B,, ended up having oversized chambers and needs a .380 ball!!
Respect Always
Metalshaper