Accurate Arms has a powder designed specifically for the short mag family of cases. The powder is called MAGPRO. I have seen a few fellows at the range that rave about the velocity and accuracy they get using this powder. On bullet selection any controlled expansion bullet should work well. Using MAGPRO in a 24" barrel should garner 2950-3050 fps with a 180 gr. bullet. I would look to the Nosler Partition in 180 gr. or the Barnes X in 165 gr. I would stay away from the ballistic tip and go with the AccuBond if you are looking the a polymer tip bullet. I think the lightest bullet weight I would consider for hunting would be the 165 unless you are planning on shooting Pronghorn at long distance then the 150's should be fine.