That' s just it Jerry. Unfortunately the spine of a carbon shaft can vary at any point in the length of the shaft. With the aluminum arrows, such as Easton, the material used is always consistent from point to nock, unlike carbons that are built up with layers. I personaly think that Blackhawk has found a way to guarantee the consistancy of their spine rating by the building process they use and the way they check it. I may give them a try early this spring only because I' ve been waiting for a fatter carbon hunting shaft. ACC' s are nice, but I use a prong style rest.

-NH