I have a percussion rifle that has a peep sight centered on the tang that is only adjustable for elevation. In order to get close to the bulls eye at 30 yards the front sight must be very far to the left such that the blade lines up with the edge of the barrel top flat. Even with that location the gun still shoots 1.5" left, and this with the front sight drifted almost out of the dovetail. I suspect a bent barrel, or a off center bored barrel, but I can't say for sure. What suggestion might you have (besides getting a new barrel or reboring) for a front sight that looks reasonable but would allow for adjustment to get the balls on target?