Yes they have, as a sort of competition round. It's known as the 9x25mm Dillon.
http://en.m.wikipedia.org/wiki/9×25mm_Dillon
From what I've read, it's quite the barrel burner, and often forces so much gas pressure through compensators that it will drive the muzzle down significantly. Can't say for sure though, I haven't fired it at all.
-Ryan