"Corkscrew" arrow flight: form issue suspected

[slowbowjoe]

For several years now, I find most of my shots show the arrow flies in a corkscrew pattern; at some distances it ends up where I'm aiming, but sometimes miss by a little as the arrow is out of a straight line.
I don't think it's tuning (could be wrong...): some shots fly clean, and I've covered a variety of spines, point weights, brace height, and nock height for best flight.
Suggestions? My suspicion is plucking of some kind. Shooting 3 fingers split, pretty much a deep hook.

[pavan]

Shooting split, the trigger finger, the first finger to begin the release is the ring finger. Cork screws, quite often means shelf contact.  If the ring finger is the last finger to go, it can throw the bowstring into a tizzy and push the bow off time as well.  I have witnessed the cork screw more with my three under friends when they over power the ring finger.
 The one other is the tendency for some to turn draw hand palm down, stretching for a maximum draw. Palm down is a more natural position than palm to the face, biting in with the ring finger and lessening the pull of the index finger is the natural grab response when resisting the palm down tendency, to prevent the feeling of the index finger going down across the arrow nock, which in time can enflame the index finger along the fingernail on the arrow contact side, which will also mess with the arrow flight.

[acedoc]

Shooting split, the trigger finger, the first finger to begin the release is the ring finger. Cork screws, quite often means shelf contact.  If the ring finger is the last finger to go, it can throw the bowstring into a tizzy and push the bow off time as well.  I have witnessed the cork screw more with my three under friends when they over power the ring finger.
 The one other is the tendency for some to turn draw hand palm down, stretching for a maximum draw. Palm down is a more natural position than palm to the face, biting in with the ring finger and lessening the pull of the index finger is the natural grab response when resisting the palm down tendency, to prevent the feeling of the index finger going down across the arrow nock, which in time can enflame the index finger along the fingernail on the arrow contact side, which will also mess with the arrow flight.

You described my issue without meeting me

[slowbowjoe]

Good observations Pavan; thank you for the insight. I have noticed my string hand has had issues (including a callous on my ring finger), and I've been working on it. Think I've cleaned up some of the problem.

[Terry Green]

In short.....string torque...