No,LOL. To blue the bore of a barrel has never entered my mind. I was putting the gun back together a little while ago and got down to putting the last 2 parts on, the nipple and clean out screw. I thought After removing them I had placed them both in a piece of tape and taped them together, then placed them with the other parts in a zip lock sandwich baggie. The clean out screw wasn't in the tape with the nipple. I looked everywhere around the area where the rifle was taken apart. It was nowhere to be found. Only one place left to look, the trash can. Digging deeper and deeper and there it was, inside a piece of tape like the nipple was. All is well.