I think it depends on a few factors.. For one what size broadheads are you shooting compared to fieldpoint wieghts? The wieght difference alone will make a hugh difference in your shots hitting the mark. Wide broadheads or narrow braodheads? Which are you shooting? They tend to fly a little different with the wider broadheads verses the more narrow ones. Are you shooting an older bow or a newer bow? Which brings in the question of alluminum arrows or graphite? My older bow would shoot a hole lot different between broadheads and fieldpoints while my newer bow shoots pretty much the same with either one. How ever I am using a lot lighter broadheads today than what I had done back then. Also my bow today is a lot smoother and faster than my older bow of yesterday. So more info is needed on whether it will make a difference or not. I also very much agree with the notion of practicing with your broadheads before the hunt.