Can't help you on the powder, but bullets I have some thoughts.
The WSM and WM are in the same velocity class, these thoughts are based on experienced WM results.
Alot of the "older" tech bullets, are built for slower velocity cartridges, like the '06 or 308.
On Mule deer over here, lighter than 165 TEND to be VERY destructive, and even if you hit anything but lungs; will destroy a lot of meat. So stick with a tougher bullet, or DON'T take anything but the easy shots.
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