Lonewolf, that is a nice rifle. But come on seriously, 3 shot into the same hole at 100 yds with a flintlock?! I've been shooting for over 45 years and with some high quality rifles and the best I've ever done was a .23" 3 shot group at 100 yds. and .375" at 200 yds and both of these groups were with different 7-08 centerfire rifles.
I think either you added a "0" to that distance or you're pulling our leg. Come on - fess up.