This is the load I used last month to take an elk and a mule deer in Colorado. It is the same load I'll use on moose next year in Canada:

Winchester Brass
CCI 250 Magnum Primers
75 Grains of H 4831 SC
180-Grain Speer Grand Slam,
OAL 3.285

Velocity 2960 fps.

The OAL seems short, but after several hundred rounds, this is the depth that works best in my custom Model 700, producing MOA groups at all ranges.