Title basically explains the overall issue that I am experiencing with my SCAR 20. I am using 155 grain HPBT Match grade ammo (reference: here). I have had this issue happen twice now, each with using the same SilencerCo Hybrid 46 can. The first time I experienced this issue was after putting...
I managed to get a FS2000 into California, but there's a minor scratch on the barrel exterior near the muzzle brake and it's already rusted.
It's about as thick as a line from a fine tip pen, should I just clean and oil it or should I look into bluing pens or cerakote?