Compromise. Silver bullets. You’ll need them for those Vampires anyway.
No, vampires aren’t affected by silver bullets, only by light and stakes through the heart. You need some kind of bullet that contains the essence of light, as in “Underworld.”
That, of course, doesn’t mean that they’re not useful against werewolves. Too bad that I don’t cast bullets, it’d be fun to do as a joke, then show people my live rounds with silver bullets. It’d make the TSA guys go bananas.