funny findings with ad shafts and spine calculator.

[jrchambers]

im shooting ad trads cut to 31.5 100 grain brass 175 point out of a 70lb at 31 adcock acs.  i had to build out the plate a bit but this is where i cant make them fly bad even with a crummy release.  acording to the dynamic spine calculator i am grossly underspined,  now i am right on the edge as if i put on a 200 or 220 grain tip i can see some bad flight sometimes.

when i tune some gold tips i end up matching with the spine calculator.

I know it doesnt mater what the calculator says but have others found with ads and the calculator.

[Paul Mattson]

AD's are a tapered shaft and will not work with the calulator.  It may get you close.

[Looper]

How much did you build out the side plate? Did you sort out your nocking point?

[jrchambers]

oh yes i did sort out the nock point, it is very touchy and i was actualy moving it too much i needed 32nds instead of 16ths and 8ths.
i built out the side plate two layers of thin tab leather about a 8th.  arows are flying wonderfull even with half the feather gone.  im still about 15lbs off on the calculator but cant see a reason to complain