We have many old books on gun designs. Hatchers and several on single shot Sharps and Shilohs. I'll have to go find them. I remember seeing many pet loads as well. I don't recall any diagrams. He was a real big fan of Pope barrels. It wouldn't surprise me if he used Harry's design as a template. Ido have all his reamers. I do recall the name TC Kennon which one of our brothers in arms posted. BTW....Stay in the family? "My Cold,Dead Fingers!" (lol)