Any good factory ammo that shoots well in your rifle from 150 gr. on up, and with a bullet designed for the game hunted. The poster above mentioned Remington and Winchester loads, and they are fine, as well as inexpensive. You may also want to consider the Federal Premium line of ammo. My 308s like both the Barnes TSX. The Nosler ballistic tip (or as Winchester loads it, the ballistic Silvertip), seem to work great for my guns. I hunt in NY, too, and they have all been one-shot kills.
You really can't go wrong here....The caliber is a great choice for whitetails, and if you find an accurate load, you are all set.