30-06 is ideal for even large north american game up to and beyond 300 yards which is what I limit my shots to anyway. Take a look at the Hornady Light Magnum ammo with the Interbond bullet 200 FPS faster than most 06 ammo and a pretty good BC to minimize wind drift on longer shots. The 150 Grain is 3100 FPS and the 165 is 3000 fps that gives you a MPBR of 300 yards.