Sounds to me like you Encore likes the Pyrodex over the APP. That'd be my guess. Try swabbing between shots with a 50/50 mix ofrubbing alcohol/windshield washer mix or plain rubbing alcohol. At first I'd sy it was the bore butter but it shot better when you changed powders. Not a pro muzzleloader shooter, only been shooting one for 8 months but I've learned some. Maybe a more seasoned shootercan give you some help.