I have a new A5 hunter and I am meticulous about cleaning my firearms. I use the same product on all of my firearms SafariLand Breakfree CLP. Never once have I had a rust or corrosion issue. My new A5 has about 600-800 rounds through it both lead and Steel. Here again I use the same thing: AA trap loads, and Kent Steel in all of my shotguns. The new A5 has a unique bolt system in it that is removeable and easy to clean. My Bolt is full of spots that look like rust or possibly corrosion of some kind. I've tried to brass brush it off and they are not comming off. Has anyone had this issue and if you did what did you determine it was? I'm planning on contacting Browning this week to see what they have to say. If its a "send it in" solution it will have to wait until duck season is over. Just curious becasue I've never seen anything like this before, its only ohn the bolt, not the extractor or any other part of the carrier system.