If you read all the posts on this subject, Wolf Gold normally has this happen a few times a year. Last year they posted this warning as they claim that they had 7 from M&P, which leads me to believe other guns have had problems with this ammunition. This time around the bulk of the guns were the S&W. Three weeks ago today I sent a letter To Wolf, asking for more details. I will post again after the mail arrives to see if they have yet sent a reply.