I'm sure that it's actually been done.
I'm also sure that there have been a couple of close calls, and perhaps even a nasty "mashing into paste of the great white bwana" when the little cartridge with the little bullet failed to do its job.
It's called marketing hype.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.