Kodiak, the Los Angeles County Sheriff's Department used 147gr Ranger SXT rounds and then went to the 147gr Ranger-T round.
A small quote from Shawn Dodson's website,
(I removed the name above to remove distraction from the topic.)
Obviously the 147gr 9mm has been serving police well since at least the last generation of hollow point design. Do you think that the LA Sheriff's Department would trust a round that didn't work. That is one of the most violent places in America. Cops were getting shot at and returning fire every week in the late 1990's. They would be in a position to tell us who the real world "winners" are.
Any of the three major weights will do fine in flesh when loaded appropriately. However, if you want that extra peace of mind 147gr is the way to go. I want to know that if a perp hides behind my couch I can get him. I want to know that if he is trying to force his way through my bedroom door, I can get him. If the bad guy tries using an open car door for concealment I want to know, I can get him.
Lighter weight bullets will deform, deflect, and lose too much kenetic energy in those scenarios. All of the above are real world scenarios that I have seen the paper work on. I know they occured and I know the defensive shooters were never tried in court. So for real world comfort 147gr is the way to go in my opinion. If you can find it, 147gr+p Federal HST would be even better.