Added The Box O' Truth to the blogroll. Lots of fun stuff there. Start with the original chapters. If you want to know what .223 does going through sheet rock or plywood, this is practical testing. He's not reading about it or guessing, he's building things and shooting them.
Endless hours of fun with water jugs, buckshot patterning, engine blocks and .357s, and so on. As someone once said, "Shooting stuff is fun." Even reading about shooting stuff is fun.