Bought an unappreciated( and uncleaned) T/C Hawken and put a GM barrel on her.She'll see alot of woods time in the Pa. ater Christmas flintlock season.I've no experience with GM barrels, ball twist that is, and was wondering what to expect accuracy wise.Sur makes the rifle hang beautifully offhand.I'm figuring if I can keep 3 inside 2 inches at 75 yards I'll be very happy.Also, the manual that came with the barrel neglected to mention a recommendation for ball/patch combo,what do you GM shooters use? Thanks...