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This spine chart is based on a 100 grain point weight. You will need a stiffer spine if you are using a 125 grain or more point weight or vice versa if you are using less than 80 grain point weight you will need a lighter spine arrow.
Our experience has taught us that it is better to be over spine than under spine.
Proper arrow spine is determined by a combination of your draw weight and draw length.
Need help, email us at firstname.lastname@example.org or give us a call at 403-896-0321
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