Believe it or not, I'd want a .22. When you're dealing with the walking dead, accuracy and shot placement are critical. Oh sure, you can blow pieces of dead, rotting meat off of them all day long but they'll keep coming. Everyone knows you need a head shot to put a zombie down for good. The suckers will look at that big wide forehead and try to put a slug through it but the frontal is the thickest bone in the skull. Nawsir, punch through the nose, you got a straight shot to the brainstem. Boom boom, out go the lights.