I had this old 50-70 trapdoor in my collection that was a unfired prototype . So with some encouragement from Mike Spangler and some help from Mark at shooting supply getting me a set of dies ,mold and a supply of crazy hard to find brass it was game on. I used a lee .515 mould that drops at 465gr with soft lead pretty much alloy free coated with Hi Tech bullet coating over 12.8 grs. of red dot . This load shot very well with very little recoil and zero leading running at 1100 fps . I hope to add to this post with some accuracy results after I do a little trigger work . So I gotta give a big thanks to for Mike and Mark for the helping hand.