What caliber do you prefer and why??
I also have a Walther PPK 380. It is the old styje and was wondering was yours the same. They call it the "James Bond Gun"
Anyone worth shooting, is worth shooting twice. Ammo is cheap, life is expensive.
Well placed shots from a 9mm will be just as effective as well placed shot from a 40,45,380,etc.
If you don't want to kill anyone then shoot them in the pelvis. They'll stop.