They were from a bag of range brass I picked up from Wes. I just assumed they were rough looking from getting abused on rock or concrete from the shooting range they were collected from. I have no idea how that ring ( or crease) got around the shoulder, it was there when I got them, but it was pretty deep and only on those two pieces. It may have fireformed out but didn’t want to chance it with that 126 year old rifle.
JTD