Read what you want, I fire +P Cor-Bon 9MM DPX in both of my Twin G-19's with no issues. I also have done the same thing in my G21 with 185 GR +P Cor-Bons. If it breaks send it to Glock just across town from where I live and they will fix it for free. Mine do it all day including my G-35 40S&W which is supposed to blow up with reloads, rate that as 7000 reloads thru it and counting. Much about nothing, unless you have bad reloads or cannot reload within specifications. Me, I have been making them since 1973.