No one answered a question from a couple pages back, and I liked it, so I'll repeat it.
What kind of ammo are we talking?
I've got upwards of 800 rounds for my .45, but only about 100 of that is for personal protection.
If zombies attack, I'd rather have the FMJ's anyway, seeing as I could kill multiple zombies with one round

.
Seriously though, how much and what kind? In a pinch any kind will kill, anyway, right?