I try not to get all my zombie killin info from a few sources, but instead the entirety of the zombie killin experience, going back to the original night of the living dead. My analysis suggests that to maximize your survival, a simple head shot should do it in most cases, don'ts want to get to close to the zombies. The key is lots of ammo ;D You should hear the comments I get from my wife when I justify buying extra ammo and clips to assure her that I can protect her against a zombie attack on our abode ;D... Guess it would also work when dear leader attacks us :o I am just hopin that 9mm will take em out as it was cheap ;)