I agree with you Dirk. I'd be scrubbing the gap space and the first inch of so of the bore with acetone, acetone-ATF mix, Seafoam, Iosso or GM T.E.C. especially since its a used '99 vintage rifle. More than likely it never had the chamber cleaned and might be the very reason it was on the used rack.Originally Posted by Dirk
Since the problem PROGRESSIVELY got worse with subsequent shots it has every indication of a carbon buildup.
Bill
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