If werewolves did in fact exist and they had the ability to turn other people into werewolves through their saliva, using their spit in a gun would probably turn them into werewolves. It would be kind of like using snake venom in poison darts. I am unsure why one would want to turn someone into a werewolf though, that seems like a terrible idea for the target, the shooter, and the rest of the world.
If werewolves did in fact exist and they had the ability to turn other people into werewolves through their saliva, using their spit in a gun would probably turn them into werewolves. It would be kind of like using snake venom in poison darts. I am unsure why one would want to turn someone into a werewolf though, that seems like a terrible idea for the target, the shooter, and the rest of the world.