txduckman07- Great post. Learning to shoot your rifle is far more important than caliber...or a bunch of other things.
While I too chose the 300 Win Mag, I believe that a man that had learned to use a 308 or 06, with that very same 180 gr bullet, could hunt every bit as effectively, at any range.
A couple hundred feet of velocity is pretty much irrelevant in field performance. Ability to shoot is always relevant.
