Must admit that I have. And even worse, twice in the last 10 years !!! OK, so I am old .... give me a break ! Both times I had rounds in the magazine but had not bolted on into the chamber. First occasion I saw nada. On the second occasion I did have a nice buck ease by .... fortunately I was able to rack a round without spooking him and made a good shot. Now I am almost paranoid about checking and double checking to make sure there is a round in the chamber.