How about some details as to what you're shooting. Type of bow, draw weight and draw length. What brand and spine arrow your using along with type of fletching and weight of point.

I have very little doubt it's a tuning issue or just arrows mismatched to the bow weight or both. And I won't say anything about clearance because this is part of the tuning process.

In the meantime go to www.eastonarchery.com and download a copy of their Tuning Guide. This should get you pointed in the right direction and answer a lot of questions about tuning.