I personally am fond of Hornady factory ammo in 100 gr. I have taken deer at 300 yds with complete pass throughs one at 200 yds right through both shoulder bones, took a Axis buck around 300-350 yds with a coplete pass through, took a big 8 pointer last year with a neck shot that blew right through the spine and all, complete pass through again. Took a 200lb hog at 190 yds with a neck shot, again complete pass through.
I have read that the Federal 85 gr holow point was rated the best drop'em in their tracks ammo. I have yet to try them, but thats what I read, heres a link for you to read. I'm sticking to whats been working for me the hornady 100 gr.
I also hear that the new remington 90 gr, scirocco boned bullet is an awsome cartridge I'm waiting for the gun shop to get some in and try them out.
http://www.udarrell.com/ultimate_deer_cartridge.htm