Chickrepelent & RickD, I freely admit I was not present in any of the "battles" of the LA riots. However, I didn't see any TV coverage of long-range shooting (from any defensive standpoint), nor did I ever read of such.
It seems to me that running out into the open to shoot is not "defense" in the normal use of the word. Scenario: The BG, with gun, comes into your store. You force his retreat from within your store, out to the street. You're gonna go out and keep shooting at him? At 100 yards? With stray people all around? And if there is a riot going on, why in God's name are you running around out there in the wide open? Leave a perfectly good brick building? Duh?
If one is on a rooftop, one still is not justified in shooting unless the Bad Guys are specifically threatening one's property--so how do you justify shooting at somebody who is some 50 or more yards away? Ever been in front of a Grand Jury?
Again: "Defense" of home or store generally presumes one is within one's property, dealing with evil people who are also on that property.
To get back to the original question, I would not be particularly concerned as to the type or weight of bullet in a .223 cartridge. Within a couple of hundred yards, any of them will dissuade anybody from further evil. I'd select factory ammo to try to avoid a hostile DA's "Why'd you load those evil, man-killing bullets?"