I don't have an H&R slug shooter yet but I have reloaded sabot slugs before. I have a friend that casts the Lyman slug that looks like a giant pellet. It's loaded in a regular field wad in a star crimped hull. They shoot well out of several guns that we've tried them in. They are touchy to reload, a bit more difficult than regular field loads but worth it. I think the cost comes out to less than a dollar a box of 5 if you cast the slugs yourself.