if your current load is loading well, shooting well and the recoil and flinch factor are good, I wouldn't change a thing. if I was to try anything at all, it would be 80 gr of 3f, which will give more fps and energy.
I shoot 80gr 2x Swiss with my 54 cal. Never shot a bear with it but tagged a deer at 100yds and he didn't go past 30yds and died. It was a double lung shot off hand with a prb witha long gun. I get similar groups with 90gr 2x goex. I prefer the Swiss. I don't use as much and it burns cleaner. It's a little more expensive and harder to find but worth it