Southern Iowa is a whitetail factory, with a long-standing reputation for producing giant white-tailed bucks. So naturally, it's a prime breeding ground for some of the most skilled big-buck hunters you'll ever find. What drives this devotion to targeting mature bucks? Is it all about the antlers? Mike Mattly, a humble friend and whitetail aficionado, drives deep into this topic and explains why he's all about "Doing It Big."