9x18 As a Self-Defense Caliber.

For a few years now, a firearm that I've wanted to bag is a Polish P64. While I will probably end up caving in and buying the weapon regardless, I'd like to have it fulfill some sort of purpose, whether that be as a carry, car, or home defense weapon. In short, I don't want it to simply be a range toy.I know a place (outside of the internet) where I can get my hands on 9x18 Makarov, so obtaining the ammo really isn't that much of a challenge for me.All this being said, is 9x18 a particularly good defensive caliber, or has it become obsolete? via /r/CCW http://bit.ly/2VVznyc