Get the book "The Competative AR 15" even if you're not an AR shooter. It has a chapter that is big, big, BIG on information about reloading .223 for accuracy. Glen is buds with G. David Tubb, perhaps the most decorated highpower shooter competiting today, and he does a good review of powders, primers, cases, all the bullets available for .223, and combinations for accuracy loading.
A "Miss" is the ultimate overpenetration!
You can never be too rich, too skinny, or too well armed!
Wake up and realize that you have the moral imperative of action..!!!