i shot mostly swiss for a long time. a year ago i bought a 40 southern mountain rifle. it would shoot tiny groups with swiss 3f, but after 5 or 6 shots it would develop a hard ring of fouling and i would have to almost beat the ball down the barrel the last 2in. i went to goex and the problem went away. i can shoot all i want to without wiping the bore. i had to find the right load with the goex to get consistent groups though. but now it's a sweet shooter with 55gr. 3f goex and a denim patch from old blue jeans. about .20 thick. my larger bores eats 3f or 2f goex and goex ol eynsford like candy,,,,,,,,,,,,,,,,,,,,,