Where are the rounds getting the crease on the end of the bullet, the feed ramp or the top of the chamber?
Ammo choices can be an issue, and although CCI is a good brand I personally avoid hollow points in any semi-auto .22. For the last 3-4 years I've been shooting the round nose Winchester 40 grain that come in the long red plastic box (1300 FPS), with much success. I've also had fairly good luck with the Winchester M-22s.