RE: put 3 diff b-heads in same bullseye
GMMAT,
It's possible to get a bad arrow in ANY bunch. When they cut the arrows for you did they cut a little off both ends? Did they square the shaft?
Believe it or not, when you go to spin test them, the nock end is more important than the insert end. If the arrow shot fine with field points though, it's more than likely the insert end. I had the same problem about a month ago, I had an arrow going "nuts". Spun test it, wobble in the back end....JUNK! I was VERY unsatisfied with the mid grade shaft I was using, GT's, then again, I didn't cut any off the back end of the arrow. The way most carbons are made, they can get pretty inconsistant on the ends.
Since the GT episode, I've since switched to some CX Maxima 250's, LOVE em'