bigbuck00,
Based on what you where shooting, I agree with AK, your underspined. Based on your draw weight and length, you should be shooting either:
xx75 2413 hard spine - wt 322 gr
2314 medium - 330
ACC 3-49 271
ICS-H 340 288
This is based on a 90-100 gr. broad head.
Heavy and speed don't necessarily equate.
The final factor will be your Kinetic energy. The more you have the better penetration.
The problem is that you need to tune your bow if you already haven't.
Paper tuning may give you the answers to what is wrong with your present set up. See Easton Archery. com for their tuning guide. It will give you a lot of useful info.
Hope this helps. Good luck
Oneida Shooter <img src=icon_smile_big.gif border=0 align=middle>