Any powder with a burn rate similar to the 4350's and RL19 ought to do nicely. Never tried it though. Let us know. My personal favourites for that application are IMR4350 and H414. Very consistent, accurate and velocities where you would expect -- 165's around 2890 fps and 150's around 3000 fps. Ya don't need more than that, and if you do, get a 300 magnum.
