It might just be the recoil from the heavy turkey loads that are causing you to hit a little high...just a thought. Since you are hitting consistently just a little high, the easy cheap fix is just to aim lower. If you keep practicing at aiming lower then i don't think you will have a problem when that big old tom is in front of you cause you will naturally aim where you have been practicing. You might also want to think about maybe getting a turkey scope or a red dot sight. They are usually a little more precise and you can really zero in where your pattern will hit. That is a pretty expensive answer though, just aim lower