Fletching with the spine of the arrow

[doverpack12]

You can accomplish the same thing with group tuning, and do it while you practice. I'm not saying I never twist a nock. I'm just saying I don't spend 2 afternoons shooting all of my arrows through paper. The arrows that group I leave alone. If something makes me question then I will turn a nock once in awhile to see if that helps.

Multiple ways to accomplish the same or similar results. Even group tuning didn’t eliminate all strange broadhead flight for me.
I shoot all mine through paper during the dead of winter in my garage or on high wind days this time of year.

Caveat to my first post is this only works with very straight arrows. I built a spine tester but only use the dial gauge to look at straightness and determine which end of the shaft to cut or equal from both ends with that tool. Once built field point needs to spin perfect or it gets marked as a practice arrow, and then any broadhead must spin perfect, not the slightest wobble or unclarity of the head shape as it spins.

Since match grade shafts have come about, previous 0.001 straightness arrows in a pack are lower straightness or less straight. That tells me manufacturers didn’t change the construction process but added a tighter tolerance sort station to pull out “match grade” straightness shafts that would have previously gone into 0.001” shaft lots.