With any high quality broadhead you should be able to get them to group about the same as your field tips. You have to make sure your bow is perfectly tuned. The easiest way to do it would probably be to shoot a group with your broadheads and then a group with your field tips. Once you have done that you adjust your rest in very small incriments to bring the groups together. Keep in mind your field point group wont move nearly as much as your broadhead group will. With that in mind you adjust your rest to move your broadhead group towards your field tips. Hope this helps.