Originally Posted by Andy W
18.5' is a little too much penetration for civilian applications. Good chance of overpenetration which is an issue for urban home defense. You don't wanna shoot through the bad guy and have the bullet pass through the wall ending up God knows where.
This is an important consideration when choosing a HD gun. I use a 115gr JHP +p+ in my G17, and I am aware of how it can penetrate walls in my apartment.