A buddie of mine hasa grayhawk and I seen him tack drive round balls and heavy charges of 3F goex BP 90 grains
I here some guys say the 1 in 48 won't shoot RB with heavy charges ;I have a older flinter by t/c 50 cal. and it will tack drive RB with 90 to 100 grains of BP
I played with a few sabot down the bore seem it loves the green keith HP BT 44 cal. 300 grain bullet
I tested them at the 100 yard target and man what groups I think I have a few left somewere laying around I just may try on deer