Hi all,

I am a newb to the Lee-Enfield game and I am looking for some insight. I recently picked up a 1916 No1 MKIII* and the first time at the range, I noticed some consistent deformation on the brass. Unfortunately, I really don't know what it tells me. I have looked down the chamber with a flashlight but I do not see anything obvious. Does anyone else have any experience with this?

Thanks in advance!

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