6mm or 6.5mm ? Either can speed up around that round count.
Clean it and reshoot. I bet it tightens up after it has been refouled. And I bet you will need a new zero.
6.5 , I still haven't got the 6mm back
Everything is pretty tight but of course I'll check. I don't have time to clean and get to a range again before next week.
I was guessing a cleaning is due but I didn't know if the items I listed suggested something else. The groups don't suck enough I can't hunt it