Sounds like it's time to take your arrows in and have them refletched. Most places will do it for about a buck or two an arrow. This would be a good time to try blazers. They fly great, weigh less and are tough as hell. While you're at it you might as well replace all your nocks. If one blows on you it can be almost like a dry fire. Again, they are cheap. Better yet buy yourself a jig and do it yourself. You will definitely see a difference in your groups especially with broadheads. Quick spins are heavy and extremely fragile not to mention very expensive.