In my .54 GPRs and .54 T/C Hawkens, I've always used .530 balls, pillow ticking patch lubed with Ballistol oil and 80 grains of FFg Goex. When I got a .54 CVA Hawkens for a friend, I started him off with the same load. No matter how much or how little powder he used, the best group was about 4" at 50 yards. I handed him a horn of FFFg Goex and his groups went to 1". You should try both powder to see which one your rifle likes best. Good luck and enjoy :thumbsup: