Loosen your grip. You are torquing (not letting the bow flow correctly) with that grip. Cradle the bow between your thumb and your other fingers and do not grab at the bow when you shoot. If you would feel more comfortable get a wrist strap and practice by letting the bow fall out of your hand after the shot and hang by the wrist strap. You can also take all your fingers off the handle except your thumb and forefinger like mentioned above. Either way loosen your grip. If something is rattling, check to see if you can tighten with an allen wrench. That will help. Some people even use lock-tite to secure all nuts and bolts.

hope this helps.