My friend has a shooting range here in kansas. we were shooting at some milk jugs full of water that were setting on some small barrels at about 380yrd out acorrding to the range finder. they have set there so long that they have collected rust at the bottom of the jugs, well my friend has a 264 win mag with a 6X scope on it with the t -n- dot style hairs, man sec shot blew the milk jug up is this competition shooting or do i need to keep practicing?