My oldest rifle, built in Cornish, NH by David Hall Hilliard sometime around 1865-70 is my best guess. .50 caliber 16" twist that wore a scope from day 1. I'm of the thought the scope is not original, but don't know the maker. Shoots well enough that it took 2nd place at a match held in Cody, WY back in 2011 in a 10g20 full value crosswind against a group of shooters with far more experience than I have with guns of this sort.
Cross strip patches for the bullet third from the right.
The target from that match
If you look closely you might see some similarity of style between this one and the tools used by the damn Yankee snipers.