I picked up a CZ 527 in .223. When I got the rifle I found the action stiff, no the butter smooth action of my VZ-24. So I took it apart and noticed the fit of the parts needed to be better. The use of Prussian blue confirmed my suspicions I lapped the extractor collar, the bolt cam surfaces on the rear of the bolt and race way where the bolt travels. I was careful not to get any lapping compound in the locking lugs, even tho the contact in that area needed some work. The action now is much smoother and faster.
Has anyone else had this problem?
The rifle shoots sub-minute of angle with factory loads.