Knight will send you a manual with load data if you ask them. I have the load data though and can give you the loads they have. They will tell you that 60 gr of 777 is the max. I'm using 60 gr of FFFG 777 and a 240 XTP. I get 1347 fps and 967 Ft. lbs at the muzzle.


50 Gr. FFFG Black Powder 240 gr. XTP 1115 fps/662 Ft. lbs Muzzle
60 Gr. FFFG Black Powder 240 gr.XTP 1200 fps/767 Ft. lbs Muzzle

60 Gr FFFG Black powder 260 gr Knight Pure lead bullet 1160 fps/777 Ft lbs. muzzle
70 gr. FFFG Black powder 260 gr. Knight Pure lead Bullet 1202 fps/834 Ft. lbs