Finally got my Zues QC put together in 6.5 CM. Took 20 rounds of Hornady 140 gr Eld-m and 20 rounds of Federal 140 BTHP to the range to break it and me in. Probably not smart to adjust and feel out a new chassis at the same time as a new barrel, action, bipod, trigger...etc, but oh well. I wanted to get things fleshed out before starting load development and see what the bore looked like for cleaning after 40 rounds.
After 20 rounds, it and me were finally adjusted and settled, so I tried an experiment since this IS a QC action. I shot 5 rounds of each, then loosened the QC screws, broke the barrel free (just half a turn), snapped it back on, torqued the QC screws, and shot 5 more. NO POI SHIFT! Action is bedded in a MDT ACC with Marine-Tex. I did not remove the action from the chassis when i broke the barrel free.
And no noticeable copper fouling. Barrel is a 26" Bartlein LH gain twist 8.25-7.5. Chambered by Bugholes.
Add: I think I might still have the target. I'll post pics of it and the rifle soon.
Edit:
As promised... Pic of current set up.
Pic of Federal and Hornady 5 round groups on same target after resetting barrel.
Pic of settled upon load. 5 rounds @200 yards.