My CVA Optima like the PB 324 gr. I think. Its the yellow one, 300gr. something.
With 100 777
I tried 245gr.SST Hornady with Pirodex, and they were all over the place.
Then I switched it all, powder, bullets and went heavier, thanks to DA advise.
CLeaned between every shot, and I mean EVERY SHOT. Spent alot of time at the range that day but I could cut holes at 100 yards with 3 shots.
Every gun is differnt. what works in mine, yours might not be able to get it on paper. So take your time and take alot of targets. I don't think anything over 100 gr. is unnessary if you have flames coming out of your barrle.
that is my $.02