I had three 10mm's A Glock and two S&W 610 revolvers which shot both 10mm and 40 s&w. I loved them and the 610 was the most accurate revolver I ever shot. The feds spent a ton of money developing it then loading it down and finally came up with what the already had,a pistol that matched the 45 auto which they had all along. I have had all the Glocks and most all of the other so called defense guns and shot thousands of rounds of comat shooting. My choices if my life depends on it is a good 1911 45 auto followed closely by a 4 inch 357 mag revolver with 158 gr lead hollow points at about 1200 fps. The Glock 10 mm was the most accurate of all my Glocks.