uh, I carry a 25auto. it's loaded with a cartridge that splits up on entry in the body. forgot the name of them but they were $8 for six cartridges.
I carry 4 in it. one in the chamber, three in the magazine so as not to over compress the spring.
it's not for combat, just to ward off a mugger.
my home gun on the other hand, will blow a very large hole in a home-invader.
The reason for my ROFLMAO is mostly because
a. It is a poor excuse, even if that guy actually works as a security guard.
b. Most security firms have a minimum requirement for the firearm cal and I don't think the 25 ACP is on the approved list.
I had one of those little pistol and with the standard FMJ bullet you can shoot at a sheet metal piece from close up and don't even get a deformed nose, forget about any penetration.
A 22 lfr is a better choice.