Newish faxon barrel. Whenever I chamber a round in it, it gives it these strange horizontal ring marks. I've never seen these kinds of markings on chambered rounds. Obviously bullets won't come out without some marks on them, like the semi-vertical gashes you'll see the feedramps place, but never seen these. Some people said it could be a chamber burr.

I cleaned the chamber really well with a chamber brush to rule that out. Any clue? Rifle is performing.. well, at a faxon level.

EDIT: Just checked and this happens with my 10.5 Criterion. So I guess it's normal?