Quote Originally Posted by BarrelNuts View Post
... sounds like .223 or .243 are probably your best bets.
I hate to be conformist, but it's exponentially easier/cheaper to shoot a standard military round than a relatively oddball commercial round.

Starting out, I wouldn't do anything but .223 or .308.


Quote Originally Posted by BarrelNuts View Post
Once you're at the point where you feel you have maxed those out then go for a bigger bore if you want... just buy a new barrel and change out the bolt face as needed.
I wouldn't bother with this, either... This would cost almost as much as another rifle, and then he'd still have only one rifle. Better to just buy another gun when the time comes!