Very true on the headspace thing. Always need to check that with light strikes.@thestacce - a light strike could be indicative of a headspace issue. This could be a problem with the bolt, the chamber, or the barrel's seating in the barrel extension. I would do more work to diagnose the problem before focusing on the bolt. Have you measured changes in headspace between un-fired and fired brass to see how much the brass expands o firing? I'm not an expert, but I would guess that seeing over .005" indicates a headspace problem.
On the brass shaving issue, if it bothers you, I would carefully break any suspect sharp corners with some 1000 grit sandpaper.
The brass “shavings” don’t concern me. Prob would have never noticed if I hadn’t pulled it for the sake of comparison.