Actually, it doesn't even really have to be a bullet. The bullet doesn't even have to do actual damage.

The introduction of silver to the heart will stop it from beating immediately. If you're a good shot and have bullets made of pure silver on hand, then you should have the easiest time of anyone killing a werewolf. The myth that werewolves will die from a silver bullet to the heart is no myth at all. How to Kill a Werewolf The Silver Bullet Method I have a few recommendations to make the job easier. The challenge is not really figuring out how to kill a werewolf, it's figuring out if you're going to be able to kill that werewolf before it kills you. Getting hit by a car, falling from a high elevation, or bleeding to death will all work just as well on a werewolf as they would on a human being.

Werewolves can be killed through a various number of methods, much like humans. That doesn't mean it's an easy task, though. Unlike vampires, werewolves don't have specific methods that need to be used to kill them. You probably already know how to kill a werewolf, even if you don't realize it.