Pretty normal except for the ring. Could be from when the barrel was chambered. From what I can see in the pics it looks minor and unless it bugs you a lot most likely won't be a problem. Check the chamber with a bore scope (a $50.00 tool) an if there is a ring there a quick chamber polish at that location in the chamber would likely get rid of it.
On the plus side, I was looking for a way to mark my brass so I could tell at a glance if was 6.5 Grendel, converted 6mm PPC, or converted 6mm ARC. Having a ring on the ARC would work.
On the plus side, I was looking for a way to mark my brass so I could tell at a glance if was 6.5 Grendel, converted 6mm PPC, or converted 6mm ARC. Having a ring on the ARC would work.