I put some jacketed .38 and .357 downrange last night (took forever for the registration cert to arrive). The tooth didn't budge, nor did it when I cleaned it afterwards using the copper brush and lead remover cloth. I contacted the seller who isn't interested in taking it back; he claims he never saw the tooth and suggested that I be the one to talk to S&W about warranty. I find it hard to believe he's never looked down the bore, but if it's fouling, I suppose it could have happened on his last shot before selling it. Before going through the effort of shipping it out west for warranty assessment/repair, I might take it to a local gunsmith to get confirmation that it's not just a super stubborn piece of fouling or machining debris. I'm reluctant to try scraping or pushing it out myself with metal tools for fear of scratching the bore. Being my first EE transaction, I guess I learned the hard way to always ask about the condition of the bore, and get a photo if possible. Not sure what to do about my feedback for the seller.