Try some Pyro RS powder at around 120 G and work Your way up. Try the Hornady SST,s in the 250 G with black sabots. Worked great for Me. It did not take more than 20 to 30 rounds to perfect this load. Sight a little high at 100 and You will be suprised how far and flat that BP gun will shoot. Good luck and do not give up. I think You will really like that gun when You get it figured out.