There are three spine factors in any given arrow... length, head weight and energy.
Once one is locked in then the other two are the only way to tune spine, once two are chosen then it leaves only one.
There's no problem with keeping a shaft at 32'' instead of say, 28''... Just use head weight and energy(poundage) to achieve optimum spine.
Charts for any length just get you in the ballpark... tuning for optimum spine is how you tune a bow.
Kent
