My friend's dad told me that 9mm would only piss someone off but that .45 would intimidate robbers for miles around.
"If you want to stop a threat, shoot it with a 45. If you want to kill it, shoot it with a 22." I forget where I heard that...
Its like the old thing of 22lr not being a killing round. I say BS.
To many people get focused on hardware and not software.
In this day and age we should all know software is the key.