The OP stated he was considering trying aluminum arrows for hunting next fall. I was just trying to be helpful pointing out the higher quality spine consistency , but poor durability issues that we don’t have to deal with anymore with all the modern carbon shafts available. Carbon is either dead straight, or broken.
As far as the what size aluminum shaft to start out with question goes, there have been several recommendations already than can be tried, as well as other options.
but the center cut on the shelf depth , and strike pad thickness will dictate the tuning as much as draw weight will. Good luck my friend…. Kirk