Need some help here . I am not familiar with carbon rings at all . This is in my friends rifle I was starting load development for hammer Hunter bullets and found this!!! Picture on the left is a photo of the display on the bore scope as all of the pictures are! Is the white fuzz y stuff reflection or spider webbs? (I don't know how to attach it to my android phone) I tried to show the throat area and what I thought was the carbon ring with copper from the dummy round I made up! Yes it stuck in the barrel and tapped out easily! You can see the rough ring around the dummy bullet in the right picture.I believe the bullet may have pulled out of the case a bit when I ejected the round. The third picture is a close up of ( copper ? ) in the throat. Thanks for all your thoughts,comments and or advice .