I am not a shotgun guy for home defense or, at work, for clearing buildings which shares some similarities with HD. Many comments here reflect my thoughts why. Chameleox hits on some of the more salient ones in his post just above this.

Also mentioned earlier is the shotgun’s propensity for penetration. 00 and slugs consistently show extreme penetration in FBI tests. I am not one to fret about over-penetration; it is oft-discussed but very seldom found to be an issue. In fact, I can’t recall ever reading where it was a factor.