Well, technically not me, my step-father. He's using a Thompson Center Encore with a standard rifled muzzle loader barrel. He's getting ready for a hunt where he will have shots up to 200 yards so that's what he's practicing at. He's using 3 of the 50gr black powder pellets and I believe 245gr sabots. He said they have a black plastic base and are called "magnum", not sure on brands of the powder or bullets. Anyway, he's shooting great groups at 100 yds, average of 2-2.5". When he moves out to 200 yds his groups are opening up to 6-8" and the bullet holes are larger and ragged. I know he's tried a couple different weight bullets, but wants to stay with the lighter ones since he's planning on taking longer shots and wants the velocity. Any ideas of where to go from here? He asked me but I don't know much about muzzle loading.