At 31",400's arenot all that too stiff for 45 lbs. Every 25 grains in tip weight mean a 5 pound change in spine. You're using 100's now. Get some 125 and 145 gn field points from 3 Rivers and see which flies better. Then just switch out the points when you switch bows.

I've shot some really overspined arrows from bows before. Accuracy falls off some from using the proper spine, but the arrows all flew well. If your arrows wereunderspined it'd be a different story, but I don't thinkspine is the underlying cause of your bad arrow flight.

Check your nock fit, playwith your brace height and don't be stubborn... play with your nock height. What's right for release is usuallycompletely wrongfor fingers.