What kind of muzzle loader do you have? Or do you have one?
I have a slow twist round ball gun that is good for 150 yards on small targets. It is a Lyman .54 cal Great Plains rifle with 1:60 twist. It has a set trigger which is nice. Round balls are easy to find, accurate and cheap. A 40 or 45 caliber round ball gun would shoot a little flatter and have enough knock down for Coyotes. The slower twist barrels are better when shooting round balls at high velocity 1400 - 2000 fps.
If you go with an inline or other gun to shoot conicals get one with a twist rate faster than 1:48.
