Green on the case of the first round in a magazine it was Hornady defense ammo brass casing.

This worry's me I was doing a check on my nightstand gun when I found the corrosion on the round. The gun was a Ruger SR45 and it had been fired and cleaned just 2 weeks ago. after checking the chambered round the same thing was on the bottom of the case near the primer. via /r/CCW http://ift.tt/2p7PRr5