This was virgin brass to start. Brass has been fired six times all through the same gun. Tac 30 in .260, bartlein barrel. Shooting 139 scenars 18k off the lands 41.7 h4350, 2815fps. I anneal every second firing on a bench source annealer. I just noticed this ring today, just barely catches a fingertip ever so slightly. Also just noticed some scratches around the neck as well. Seems to be on every peice and not all the way around on some.
I full length size with RCBS gold medal die and 291 bushing. Trim to 2.025 each time.
I have a 1000 rounds down the tube and cleaned at 10rds, 100, 500 and 900 rounds.
Anything to worry about or ideas on why it has shown up?
I full length size with RCBS gold medal die and 291 bushing. Trim to 2.025 each time.
I have a 1000 rounds down the tube and cleaned at 10rds, 100, 500 and 900 rounds.
Anything to worry about or ideas on why it has shown up?