I had shot three rounds, adjusting the sights as I like them, and I had been swabbing the barrel between shots with a damp rag. THe last time got too damp, ... A little smoke and such came out the end of the barrel after a mild noise. I waited and then took the breech plug out of the CVA Wolf (thank God for breech plugs). I was surprised to see the barrel empty except for the crud. I ran a patch through and put it back together. I couldn't find the errant ball and it worked fine with a barely damp patch (pretty cruddy rag). I had never experienced anything like that. Anyone else have a misfire? This thing is really fun to shoot, but I was not looking forward to removing the ball from that barrel! Probably, a fired 209 cap fired between loads would have dried it enough, but I had to learn.