I'm sure the subject of 300 blk vs .308 has been broached a million times, but my question isn't merely about the effectiveness of caliber. My question is this: Do I embark on a AR 10 build, or do I buy a 300 blk upper and call it good? My pockets aren't as deep as some on here, so money is a factor. Of course, if I win the aero precision M5 .308 here http://www.gunwatcher.com, I guess it would be a mute point. For those that have done both...or either, what's your experience. The whole purpose of the larger round is for hunting. Thanks