My buddy just got a great deal on a used TC 50 cal flintlock. It’s in great shape but we can’t figure out the barrel twist rate. The gun looks like a traditional Hawkins style and has set triggers but the barrel is 2” shorter, no patch box or cheek piece on the stock and the ramrod holders are black. Anyone know the barrel rifling twist rate on this style TC and what shoots best out of it for lead projectiles. He got a box of Hornady PA conical bullets with it (unopened) and a box of 185 gr round balls.