65 Monster new 12" grendel barrel - living rings on brass

[jsallen628]

Just installed this barrel as I wanted to try a monster, went out and shot 25ish rounds, all the brass came out with the body covered in concentric rings, it appears the chamber is rough - see pics - will this work out? or did I get a bad barrel or will this work itself out ? thanks for any info --- can't figure out how to resize to upload pics, however body of brass is covered in rings as well as the chamber.