If you believe your bow is tuned as you say. Then broadheads shouldn't have that much difference then your field points. Long as your using the same grains. When broadheads hit totally different then your field points, thats often a sign of a improper setup. Ex. arrow spine to length of shaft to bow poundage. Or a improperly tuned bow. Broadheads often show problems that field points won't. Its not always the broadhead like many think. Your going to have to shoot some heads to truly find out. Then if see a major difference thats when you'll need to figure out why to resolve the problem of adjusting & readjusting your pins. Its just part of it. Get it right if its not, and its one less problem & headache down the road.