Wow nmbarta you really are being hard on yourself!! Mistakes are mistakes and oftentimes are avoidable, however that's what they are "mistakes" and not intentional actions. When I hear people call themselves stupid, I ask them how they would like it if I called them stupid because there's really not difference. Anyway...........I did something quite similar as your mistake, something that I am, and was not to happy to have done. I was shooting five-stand with my Remington 1100 20 gauge with a bunch of friends. I was using an ammo bag to hold for my ammo and to hold my hulls. One of the guys who I was shooting with had a Remington 1100 in 12 gauge. While we were shooting the course I was talking with this guy about his 12 gauge 1100 and how it shot and recoil. After we had shot the course he asked me if I would like to try shooting a few rounds with his gun, and I said yes. He gave me a couple of rounds to shoot, I put them into my range bag, set my shotgun in the rack, all this time we were BSing and I was not really paying attention to business. I took his gun, reached into m range back, pulled out a round and threw the round into the chamber, BSed some more, called pull. I raised the gun up and "CLICK", so "Oh" I must have forgotten to put a round in the chamber so I reach into the range bag, pulled out another shotgun shell, put it into the chamber making sure there was a round inside of the gun this time. At this point I was getting ready to say pull when one of the other, more experienced shooters, told me to hold up and to check the barrel of the shotgun, which I did. I still thank Frank for paying attention because there was a very nice 20 gauge shotgun shell lodged inside of the barrel. Apparently there was still a 20 gauge round inside of that range bag and when I reached into the bag to get one of the 12 gauge rounds I pulled that 20 gauge shell out first. Had I pulled that trigger it would have been catastrophic for everyone on that shooting field. Had I been paying attention instead of BSing I would have realized when the gun went "click" that there was something seriously wrong or I would have caught it when I heard the round fall down the barrel!! When something like this happens it can be a blessing in disguise because it gives us a real "wake-up" call and keeps us on our toes. Sometimes after shooting for many years we become callous. Right now as I am writing this reply my butt cheeks slammed together and everything between them slammed up tight!! Thanks for sharing this with the group, by doing so you probably helped people to pay more attention and prevented something serious from happening to them!!