Arrow selection - my new method

ChakaZulu

New member
Ordinarily I know what spine I'm after so I roll the right spine until I find straight ones, then weigh them so they're all the same (ish) and then spine check them and pick the ones that are the closest.

Yesterday I went to get arrows for my soon-to-arrive:cloud9: Border Griffon 50lb.

I knew I wanted 8.5-9gpp to try it out for speed without risking the limbs. That equates to 425-500grn total. Allow 15 grains for nock and feathers gives 410-435.

The shafts in the shop are 32" long and I'm cutting them to 29". Dividing by 29 and multiplying by 32 means that I'm looking for full-length shafts of 450-480grn including points.

Border tables here told me that at at 28" draw I'm looking for 55/60, 60/65 or 65/70 spine, depending on point weight (100, 125 or 150 respectively). And yes, I know I'm cutting to 29" and drawing 28" - sometimes I overdraw a bit and like to have a little spare - I'm working on it.

I picked out a load of 60/65and weighed them, knowing that since I'd be adding a 125grn pile to this spine, I wanted 305-335grn shafts. Almost all were over 400grn. That would give total arrow mass of more than 10gpp. Next I weighed the 55/60s and found some at 350-360grn. Adding the 100grn tip required on this spine gave 450-460: spot on.

Having found a selection at that mass I rolled them until I had a dozen that were straight. Spine testing them I picked the 6 that were closest together (at about 58lbs, which also allows for a draw that s slightly over 28").

They're now fletched and awaiting the bow. Knowing my usual form they'll go all over the place, but it felt very scientific...
 
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