(from Jan 2014)
The AR-15 is becoming more common for home defense than ever before. In this video I explore another promising self-defense/home defense rounds made in .223 Remington, the Lehigh Defense "Controlled Chaos" 45-grain fragmenting hollow point, part #05220045S. The test barrel length was 16".
The bullet has two wounding mechanisms; it's a fragmenting round (like M193) combined with a solid caliber-diameter bullet. The idea is to get the massive temporary cavity caused by a rifle, which gets magnified and turned into permanent damage by the fragmentation, combined with a deeply-penetrating base bullet that can penetrate the vital organs (if, of course, your aim is good enough).
I used genuine professional organic 10% calibrated ballistic gelatin to determine the penetration and expansion characteristics.
Note: I'm not making any claims for these videos other than that these are the results I achieved, in my own testing, from the stated pistol(s). I have no intention to make a blanket endorsement or indictment of any product, only to review and report what I found in a given instance. Obviously it is incumbent upon each individual to conduct their own research and make up their own mind about which defensive ammunition is best for their own purposes, in their own firearms.
The standards I use to judge bullet performance are the standards established at the 1987 and 1993 Wound Ballistics Conferences, and subsequently adopted by the FBI.