My Omega shoots ragged holes at 100yd with heavy loads of APP_FF on the other hand the 35.5 inch barreel on my copy of the Hawken in the ST Louis Musem likes real Black Powder. If you look till you find what the gun likes then you make any compromises you feel you have to.
Lay out a systematic plan find a sabot that is real snug,loose enough to be reasonablebut still tight enough to shoot good Pick out bullets suited to what you will use them for,trybullets suited to the twist per length [ the greenburg formula might help some] try the different powders run a group for every 10 gr then 5 gr on each side of the best one. There are no hard fast rules on what shoots APP-ff works best for my Omega, some people have the best luck with Gold and about half like to clean or is that the dirty ones shoot the best for them? Lee