Here in Indiana shooting a deer with a 9mm would be an illegal act. I took a look at the Missouri regs and couldn't find whether that caliber is OK or not. I would most definately check with the proper authorities prior to heading to the field with one.
With that said..........
I don't feel the 9mm to be anywhere near enough power to take deer sized game. Sure, with an expertly place shot you can kill a deer as dead as a 300 Win mag would kill one, but there are much better choices out there.
hangunnr