RE: Finding the right grip consistently
Most grip problems are a result of gripping the bow-either before, during, or after the shot. Try shooting with an open, RELAXED, hand, and make yourself keep an open hand until the arrow hits the target. Some say they can do this without a rope, but it's nearly impossible if the shot is a surprise, so use a rope if you don't already use one. Someone with good form at 20 yards can change their grip to only hold with their thumb and the arrow will still hit in the same spot. It all boils down to maintaining consistant pushing and pulling, and shooting with a realaxed grip.
Try to keep in mind, your bow hand only holds the bow up-almost like a forked stick. Some of the grip advices here are great for establishing a consistant starting point-that is a must, but if you grip your bow in any way, or your hand is not relaxed, you can throw all of the other advice out the window.
Try keeping that hand open until the arrow hits the target, and see if your right to lefts are reduced. Don't try without the rope though!
Jeff...U.P. of Michigan.