TFox, I was half asleep last night and missed the main jest of your last response. I understand the weight deal, but even with an inch and a half long broadhead, even though weight is weight havent you added length to the shaft and thus made it react slightly weaker.Ive just always got f.oc. of my f.pts, and then just figured a half a point difference. Once again If Im spined, and like you say slightly over, they hit together so never really measured again or worried about it if it still fell within guiedlines.Sattelite seems to agree, and be thinking along the same lines,because of the design of their matchpoint system. How many tenths of a point off.o.c. is it, I have no idea. Thats why so many people right on the edge get good groups with f.pts which is acheivable with a horribly spined arrow and large heli fletch and then switch to bhds. and flight and grouping open way up. Theyll group together, but no where near the f.p. groups. That extra bhd. length definately does something,spine wise. If its not f.o.c., then what is it. Drag alone wont take them low left or right to the extremes Ive seen. Im gonna dig out different weight field points and old bhds. today and find the difference. Ill probably just confuse myself more. Wait, that aint possible. Once again T, not arguing with you or Easton, just trying to make sure for myself. Something just doesnt seem to make sense.