Round nose bullets have been doing good for me. 170gr Hornady have never failed me at 8x57 velocities, the 196 Norma Dual cores have been one of the best I've tried. Shot a medium sized black bear on the run, rear end shot and came out the chest, I couldn't believe the amount of penetration that bullet went through. Bear dropped on the spot!
I also plan on trying 250gr RN Woodleighs in the near future out of the 8mm-06 @ 2450fps

[Linked Image from i.imgur.com]