IF you are shooting a newer model bow, go with a really open grip on your bow hand. I had the same issue 2 years ago and a Hoyt Olympic shooter taught me to open that hand up as much a possible to reduce feedback to the riser. I shoot a Hoyt Trykon now and I don't even close my fingers at all with this rig. My groups have become more than acceptable now. If your bow is older try just holding the bow with your pointer finger and your thumb in the "OK" position.

The second trick is to flatten your hand parallel with the ground so your hand is touching the grip with only the muscle between your first finger and your thumb. (not on the palm on the small side of your hand.) Once you get to full draw flatten your hand out. This adds about an inch to your draw length but I took up the slack in my elbow with more bend. ( Also helps get clothes out of the way.)

Bottom line is less touching the bow the less input to the grip to make the bow torque.