one fer one is a good place to start , is it Pyrodex P you're using ? Bear in mind that compared to ts2 and other genuine gunpowder , pyrodex is VERY corrosive , clean thoroughly asap after use . I like 777 , not as corrosive and slightly more powerful than BP , I shoot .44 revolver . .36 rifle and 45-70 and use 777 in all.