Thread: CZ452 stiff bolt

Yeah, that is a way. What it is doing is lapping the contact points, or marginally removing material. Some cheaper actions don't have good heat treatment, especially older ones and have a thin hard skin on the lug engagement areas and the like. There are actions that do benefit from this treatment, but my personal method is a lot more careful and I do one small area at a time and work the bolt a few times and then wipe off and check. What I usually find is that by starting on the rougher and worst looking areas and working progressively through the less rough parts you very quickly get to a point where the improvement is noticeable and you haven't removed much metal at all. It's very hard to put it back haha.

On the CZ, I'm not sure if this would help with what is being described - I would be suspecting that the cause is either some crap or a chunk loafing somewhere that is fouling something OR there is some fouling in the chamber or throat that is making it hard to shove the next round in. I'm wondering if a decent brushing with a good bronze brush, a good carbon solvent and a quality brush with a bore guide will sort it?