Just curious, was the high hits using the Practice Blade that came with the Muzzy pack? If so, in my experience, flew high. If you change anything to help the flight of the broadhead, is going to change the flight of the field tip. I would first paper tune with a field tip and then shoot a bladed, not practice blade at 20 yards. If you you still hit high and are going hunting soon, compensate for the broadhead. Also have some one stand BEHIND you while you shoot and watch the arrow. See if the arrow is flying true or if it is planning. You didn't say wheather you shot helical or straight fletching.