Machining marks on fired case shoulder

[PLhunter]

I recently had a local gunsmith profile and chamber a k&p barrel. I have about 100 rounds down the barrel at this point. Cleaning cases I noted texture and rings around the shoulder. I was also cleaning cases from my old tikka chamber and they were perfectly smooth.

First does anyone think this is an issue worth bringing back to the gunsmith? The gun shoots great. BUT I’ve already cleaned the chamber twice because I’ve had pressure emerge on loads that started fine.. I realize this could be barrel break in too. The pictures
don’t really do it justice. I have some chambers with faint rings but these are actually palpable.

 

[wapitibob]

Dull reamer. My stw is a lot worse than that and it shoots fine.

 

[Lawnboi]

Zero issue.
Here’s an extreme example. This is 7 times fired brass that came from my most accurate 6 creed barrel I ever owned.