You should be able to get your broad heads to shoot very close to your field points, if you paper tune with your field tips and recheck with your broad heads. Broad heads will exaggerate the problems ofa poorly tuned bow. When that arrow kicks out (or up or down) the broad head blades start to catch air or plane the air and they have a different impact point than the field tips. You will also need to shoot the same weight points and have the correct arrow shaft spine and no fletching contact. Larger broad heads can be tougher to get to fly as good. I like to paper tune at about 6 feet out from the paper, further than that the fletching has too much time to correct the flight of the arrow. Good luck and be patient with it.