My 100 gr. 4 blades hit right with my field points. Everything, I have read, however, indicates this is the exception, not the norm. But, I also understand that is the case with any fixed blade head, save the newer low profile heads. A properly tuned bow, with ABSOLUTELY no fletching contact is a must. I also found that feathers do a better job of stabilizing, but that is just my experience. Get that bow shooting perfect bullet holes in paper, and see if that don't fix it. Otherwise, just adjust your sights, and problem solved. The group is what you are looking for.
Medic167, if you are truely shooting 304 fps, the fact that you cannot get a muzzy to fly doesn't surprise me. I didn't see in your signature what broadhead you are shooting, but I doubt you will get any fixed blade to fly perfectly. It is just too fast. This is JMO however. Since the daughter took over, nothing has changed in the way Muzzy manufactures its heads. THe difference is todays super high speed bows. Anyway, that is all I have to say about that. This, again, is just my humble opinion.