I was in the process of cleaning my LMT and I noticed 2 scores or machining marks on the face of the chamber opposite LMT’s “star” Proof mark. I am not sure if these where there before or if I could have possibly caused them. I usually use a chamber brush (the kind that comes in the USGI kit) followed by a few passes with a Boresnake followed by a Otis cleaning kit to clean the barrel and chamber. The only possibility I can think of is the chamber brushed caused it unless they where always there. Do you guys think they will have any adverse affects on the rifle? I am going to try to get a few pictures of the marks
Thanks


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