Quote Originally Posted by r3dn3ck View Post
damaged crown is my guess. How's it shooting at 25yrds group wise? Any keyholing or elongated holes?
To check for a damaged crown, run a q-tip or cotton swab up and down/in and out of the end of the barrel. If any threads of cotton catch on the edge, you have some kind of a burr that needs to be smoothed out.