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I looked at several of the arrow selection guides for proper spine but I don't see a calculation for increase/decrease of draw length when selecting proper spine. It would seem to me that a longer draw would require a stiffer spine due to the increase of the "power stroke". Vice versa for short draw shooters.
Aren't all these guides based on a universally set draw length? Do you just add/subtract a pound or two per inch? Maybe I'm just over-analyzing this like I do everything else!:confused:
Bowhunting.....another victim of my OCD!:boom:
 

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I've seen where some of the guides have you add or subtract pounds for different drawlengths relative to 30" (I think).

Best bet would be to spend 14-25.00 on OnTraget2, then you can put your actual set up in there and do all kinds of different arrow setups that will produce a good final product.
 

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Use Ontarget2 and you can model all the setup combinations accurately. get the free trial
Cheers
Peter
 

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Marty,

You are absolutely correct. Given a bow of a certain peak weight a person shooting a longer draw may very well need a stiffer arrow--just for the reason you state, longer power stroke. more stored energy.

It's not always a combination of the length of the arrow and bow weight. That's often why bow charts can't pick the right arrow for a certain setup.
 

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I believe Eastons arrow selector takes into affect the draw length or at least the length of the arrow.
 
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