I only shoot my home cast lead bullets in my 9MM's and .38 Super. That is all I have ever shot in them since the middle sixties. My standard alloy is wheel weights plus one and one half percent tin. I have owned and shot many different 9MM's including a war time P38, Star Firestar, Browning High Power, P08 Luger, S&W 59. None demonstrated any problems with home-cast bullets.
Not often mentioned by Christians: Numbers 31:17-18