Bobby Hoyt did great work for me on a .58 musket.Several years ago i paid $150 for a Navy Arms "Hurricane" Hawken that had probably never been fired. The stock was badly dried out and i livened it up with linseed oil.
After killing a few hogs using conicals, that rifle sat around for many years. Finally, the barrel was shipped to Mr. Hoyt, who turned it into first class .54 caliber round ball rifle with rounded grooves and 1/66" rifling..