I had a 50 cal. Renegade that had a good stock and the barrel was a "rust bucket". I laid it back hoping to find a good barrel. A fellow range member heard me mention it, and told me he had a brand new Green Mountain barrel,that he'd sell me for a reasonable price. It was a 15/16 Hawken barrel, with round ball twist. I bought it hoping that I could make it fit.
I fitted my tang to the hook on the barrel with a little bit of blending of the top three flats on the new barrel. There is only a 1/32 per side difference. The part that the wedge pin goes thru is bolted on, so I added two washers, 1/32 each and the wedge fit perfect. I added 1/32 shim, fore and aft of the wedge pin, and I now have 1/32 gap on each side of the barrel, which is barely noticable. Kind of free-foated. I put the Renegade sights and ram rod thimbles on the GM barrel. I refinished the stock and left the metal work a little worn. The longer barrel makes a Renegade look better.
Here's the greatest part of all. This thing will shoot. I shot some of the new Alliant Black MZ and .018 patched round ball,.495 with wad over powder. I have three Hawkens, and none shoots like this rifle.