I re-load my own 12 shotgun shells for long range. I purchased a Lee hand loader for 20 bucks off of e-Bay. A bag of steel shot/turkey wads, 12 bucks. Unslit. I have a 12g barrel with muzzleloader sights. It is cyl bore. I re-load so have a few different powders. Recently fired some of these with #6 shot. About 60y, one raged hole. A little left. Workable. The project is to get about an 8" to 14" pattern at 60y. I have done this but had a wide group. Just an idea. My thought it's the shell, wad and load, not the gun. A project but, i think successful. Still working it. Slitting the wads, different lengths and number, affects where it is dropped. Right now no slits, a slug.