Active Response Training put up some more test results from retired police chief Jeff Chudwin.
Includes a few more different kinds of 5.56/.223 ballistic test that was not reference in my previous AR-15 defensive ammo article.
The .223/5.56 that I prefer (all-around) are bonded soft point rounds. Such as the Federal 62 gr tactical (in this article), Federal Fusion (affordable, easier to find), Nosler Defense 64 gr bonded or the SSA 5.56 PPT 64 grain bonded. Hornady GMX did well through glass but made a small hole through tissue and over penetrate, not the best choice.
The all copper rounds perform great against barriers and retain all the weight but over penetrate due to little expansion.
.223 Federal Fusion Through Windshield