So after the cleaning it functioned OK for about 300 rounds. It had the same type of failure to extract at round 2,973 and 3,080 with Speer Lawman 147gr FMJ.

It was cleaned after round 2,598 including extractor removal and thorough cleaning.

That makes 6 times in a roughly 1,000 round stretch where it has failed to extract in the exact same way with 3 different brands of quality factory brass cased ammunition..

I just got a return label and will give S&W a chance to make it right.