My issues are probably worthy of a new thread, but for now, I'll continue here. I've officially decided to contact S&W customer service. The failures to extract/doublefeeds have now happened with: Federal Champion 115gr brass, Blazer Brass 124gr, Blazer Brass 115gr, Fiocchi brass 115gr, WWB 115gr. Yesterday, I actually got a spent casing hung on the extractor and it took some force to get it loose. All of the problem casings appear unremarkable. Oddly, I now have around 100 rounds of Federal 124gr HST through the gun with zero issues. Anyway, I'm hoping S&W will get it straightened out. This is a very easy gun to shoot accurately and I plan on keeping it.