I'm building a Lancaster Rifle with components from Pecatonica Long Rifles. I'm using a percussion lock, but I'd like this to be as historically accurate as I can. My question is the shape of the tang. Does anyone have any historical information about Lancaster rifles from the period 1830-1850? In that period was the tang squared in a dovetail shape or was it rounded as the inletting the stock shown in the photo? Any advice would be greatly appreciated.