Never saw a rottweil barrel failure. I have seen in person two k80s fail. One was almost certainly due to reloads the other never had a reload in it. It was less than a month old and failed using factory shells. Thought at the time was a loose basewad but it was never proven. It went back to the dealer and was replaced with an upgraded gun. No question asked or answered. I am not sure that Kreighoff replaced it or the dealer did it. Last thing a dealer wants is a major pissing contest over a barrel failure at the beginning of the Skeet season. So I suspect he replaced it himself and dealt with the maker later. The upgrade was done as a courtesy to make the shooter happy. That has been ten years ago and the new gun is going strong.