Mike, I've taken several deer with a 20 ga smoothbore ML. That .600 round ball really knocks the wind out of 'em. I am wanting to take a hog or two with a ML or BPCR, got any down that way?

TH44, No choke in either barrel. The bore is a tight 12, mics .725. I started with a .690 In WW because it fits snugly in a shotcup. I can also use a thick lubed patch instead of the shotcup. Cant really tell a difference in grouping with either. After my first test I found I need more velocity to regulate the shots. A heavier ball would travel slower and then need more powder to regulate and I don't want to stress the old girl,,,, OR this old guy!!!!!

Daryl, that interesting, I have run into those straight rifled barrels before. I have a Springer made SXS perc ML in 18 bore with right barrel rifled in a 24 inch twist and left barrel rifled straight