First off, please don't say" buy a 9mm Luger." What I would like to discuss is what is the best self defense round given the capabilities of the 9mm Short. So its a two part discussion, in my opinion. First, what is better, the penetration of a fmj round or potential expansion of a JHP round. The round has limitations, and its hard to achieve both with limited energy. Second, specific rounds. What is going to be the most reliable, most damaging cartridge out there? Corbon, Critical Defense? Lets assume its for a <3" barrel since .380 is most often found in micro carry pistols.