I have 15,916 rounds through my 1.0 M&P 40c. Of these, 2,528 are .357 SIG rounds from a recent Storm Lake barrel conversion. An unknown amount of additional rounds was fired by the factory when it was sent back for (free) repairs with around 10,000 rounds on it. It was sent back because it had developed occasional failures to fire. After replacing every moving part except the extractor, it was good as new, and it has been problem-free ever since.