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.
Really good advice. Give the 6.5 to Mom and you will have a .30-06 for yourself. If you like the rifle you have get another one just like it in .30-06. Factory loads are plentiful. The round is good enough for the game and predators found in the U.S.A. If you start reloading the work has already been done and published for .30-06. I've used a 7mm RM and if it is better than the .30-06 for an all round rifle I can't see it.
