I have noticed that I have silver metallic flakes in the the receiver when I clean my rifle when coming back from the range. I dont recall seeing any in there when I was using federal ammo but there seems to be a small amount now that I am using remington corelokt. I checked on the internet for some anwers with little luck so I figured I would check here.
Any ideas as to what this is?


Elite Omnia, Easton FMJ, Axcel Landslyde 5 pin slider.