"Their", not "there"
I shoot thousands of .400 Cor-Bons through my G21, G30 and G.C. Also fooled around with the .40 Super. They are, indeed, just hobby rounds for me. (But then, so are my other calibers.)
So far, I haven't had to use any of my rounds for anything but hobbying. How about the rest of you?? Any professional shootists out there????