this is true^^^ and the M&P is one of the BEST platformsI believe it is easier to find self defense loads in 357Sig than in 10mm. I have also heard that many manufacturers do not load 10mm to full capacity. I carry a Full Size S&WM&P357Sig with Crimson Trace laser grip daily. I like the platform and also the performance of the 125gr Speer Gold Dot. It is really up to personal preference and what works best for the individual.