zrex,
That's an interesting link you provided to some VERY interesting and enlightening analysis on terminal ballistics based on real science, not trumped up pseudo-scientific jibberish.
But I also see that you mentioned much earlier on that you know others who use .224cals with success (the .22 Hornet is what you mentioned I believe), and regularly take head and neck shots, so I suggest that you read the entire article, including the section where your cited author condemns the use of .224cal rifles for deer hunting and even questions the wisdom of using the .243.
http://www.rathcoombe.net/sci-tech/b...s/methods.html
Scroll down to Section 5 on this page to see what he thinks about this perticular topic.
Mike