I have a Glock G21 I put in a better barrel and recoil spring and shoot 45 Super thru it. http://www.45super.com/
My favorite is 40 Super, 45 Magnum brass necked to 40, both require a 22 or 24 pound recoil spring.
I haven't shot much 40 or 45 Super lately.
I have decided to getting a G41...