Without ammo, handguns are just awkward bludgeons. After the apocalypse, ammunition will be more valuable than currency and any practical survival guide will tell you to stock up before 2012 so you have the firepower to blast your way to survival. Whether you're fortifying or roaming, your survival gear should be chock full of ammo as there won't be too many chances to restock after in the aftermath of the apocalypse.