ORIGINAL: Mojotex
I would suggest you use a quality, conrolled expansion bullet. A 130 gr. Partition for example would do fine.
I use a 130 grain Hornady interbond in a light magnum round (in .270 caliber) for my long range white-tail shooting. Zeroed at 200 yards, it only has a 5" drop at 300 yards and a 16.5" drop at 400 yards while retaining 1671 lb of energy. When I eventually start mule deer hunting, this is the round I'll use