Welcome to the boards 5210. Other than shootin left handed the only other option would be to switch to something like a 20 ga. Pattern it from diffrent yardages like you would any other shotgun for turkey.Then you will know it' s limits.With todays shells and chokes a 30 to 35 yd shot would be reasonable.My 12 yr old killed his first turkey this fall with a 20 ga. Good luck to your dad.