I am of the opinion that if you have centershot set correctly and are getting bulletholes,you have found the proper spined arrow for YOUR BOW.All bows have an efficiecy rating and just because you shoot a certain draw length and poundage does NOT mean you shoot the same spine as someone else shooting the same draw and poundage.

There are other variables to consider.Are you creating torque causing the tears or lack there of.


If you can get that arrow to get good paper at 2' and6' without fletching,I am willing to bet the arrow is perfect.