ORIGINAL: Dirt2
According to the charts, I am spined correctly, and I'm not on any borderlines. I'm using the mid-spine for ICS Bemans.
Spin testing is one of the things my bowshop does for me; I've watched them do it.
well, those were my first guesses...[&:]
ORIGINAL: Dirt2
My vanes are either straight or minimally helical.
as other's have mentioned earlier, this would be my next guess...i would try maybe more helical with my fletching...what size fletching are you using?