7saum is an easy cartridge to load for, as is the 7mm Rem Mag. With the SAUM I had, I got great results with anything from 100 grain hollowpoints over RL15, to 175 grain Noslers over Retumbo, and anythign in between. A 150 grain @ 3150 fps isnt unrealistic in the SAUM. 7mm Rem Mag can be loaded a bit faster as mentioned due to more powder capacity but the difference is slim.
SAUM is a hell of a cartridge too bad it wont be around much longer.