250gr Aerolite would be perfect. Especially with around 80 grains BH209.
That's what I was thinking. To answer the OP's question, yes it is the "new best powder." I haven't seen the problem the other poster talked about, needing resistance to light, and I'm using powerbelts--they don't offer much resistance.
It does require a standard 209 primer, not one of the special ML 209 primers.
