Fixing up an old Stevens single-barrel 12 gauge for a barn gun. Bought at an auction, it's one of my many unfinished projects recently unearthed from the garage that hides stuff. Anyway, previous owner whacked off the barrel with a hacksaw at an angle. I have no lathe nor access to one. I need to true up the barrel and crown the muzzle. I can drill, tap, and install a front bead, but the muzzle is my problem. The gun is destined for two nails in the chicken house. Thanks in advance for advice !