Add a .30-06 and you're all set. Don't fall for the stupid advice of a .280, 7mm-08 or 7mm Rem mag. as none are more capable on bigger game than the .30-06 and they all cost way more to shoot if you don't reload, which it sounds like you don't. You can buy .30-06 ammo in several brands and bullet weghts at Wal-Mart for 19.00 a box while you'll pay 28.00 a box for 7mm-08, 28.00 - 40.00 per box for 7mm mag. and they don't carry the semi obsolete .280 ammo at all.