If I know my choice is close to right, I start around 20 and will go back to 50 ydas.
This is for the grouping method.
For me, there are too many variables besides proper spine to give much credence to bareshaft flight. Seeing how they group in relation to fletched shafts tells much more unless your nock fit, form amd release are dead perfect.
I bare shaft paper tune at 6-8 yards to check for spine, point weight and knocking point location. If they are flying straight I will try them at 20-30 yards to see if they are still flying reasonably straight.
I'll usually save one or two bare shafts and test grouping with fletched shafts at 20 yards as a final tuning step.
I start at 10 yds in case I am really off, then work back to 25 yds at 5 yard intervals.
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