I want to shoot some of my 10mm loads through my GEN4 G21, so I can get an idea of what a GEN4 G20 will shoot like. I don't feel like dropping $180 on a KKM or $160 on a Storm Lake, and it looks like LWD discontinued the M/21 45-10 barrel. Anyone know a guy, who knows a guy? . . Wanna kill these ads? We can help!