If the arrow is straight and spine is the issue try twisting the nock and then recentering it to how every you shoot(cock feather up,down,out). Sometimes a slight adjustment will change the spine of the arrow and help it to shoot more consistantly.
Hmmm, so if I want to change the spine of my arrow, all I have to do is twist the nock.
If I twist a 2315 enough, will I get a 2317 out of it???
