For the most part, I carry either a 9mm or 45. Occasionally I will carry my 10mm. I've been on a 10mm kick here of late though.
I do have at least one weapon in each NATO caliber; i.e. 9mm, 45ACP (I know not technically a NAT caliber anymore but there are lots of them out there), 5.56 and 7.62x51 (308). When the zombies come I should have no problem picking up spare ammo.
![Cool :cool:](./images/smilies/icon_cool.gif)
I do have a couple of oddball calibers like the 10mm and a 6.5 Grendel thrown in the mix as well.