Thread: Just machine markings or...

Recently acquired a borescope and for up to now have only concentrated on the bores. I cleaned my Tikka 223 earlier and decided to check the bore, and spent a little more time on the chamber. I picked up these three areas in the chamber. The one is a tooling mark, but the other two is a little more concerning. Are these two marks only dirty tooling marks (they are on the same depth into the chamber) or something else, and what?