Alliant Steel powder will give the best results, but there are others that will work like longshot, 800x, 4756, and blue dot.
You'll need steel wads which you can get from BPI. The Multi Metal is an old design, so it'll be easier to find data for it with the other powders if you can't get steel. If you can get steel, I like CSD118 wads or RSI sam1 wads.
Loading steel shot isn't hard, but it is a slower process.
