I appreciate all comments here so far, but remember what the original poster said, no hunting, just range work. For that intended purpose I think the T3 would be a fantastic rifle, very accurate right out the box with no messing around. And the 223 choice is great because it has oodles of ammo choices for a reasonable price, little to no recoil so you can watch your hits through the scope, and it is a great round to learn how to reload should he choose to do so.
So load up on the T3 and a decent piece of glass and some ammo and have at 'er!
So load up on the T3 and a decent piece of glass and some ammo and have at 'er!