VonGruff,
I'll have to give Red Dot a go, I have used other Alliant powders like Unique in a range of calibres with cast bullets, it works well for me, so I'll give it a try as well.

I'm a bit of a fan of Blue Dot as well. I stole the formula from another forum, it is as follows.
Fill the intended cartridge case up to the case mouth with Blue Dot and weigh the amount, repeat at least 5 times for a consistent average, then use 35% of the full case amount and load your cast bullet. Velocities will be from 1500-1700 fps usually, seems to work in nearly every calibre, I have personally tried it in as small as a 25-35 WCF and up to a 500 Jeffery, and others such as 308 win, 338-06, 35 whelen, 450 Ackley Mag. I believe it even works for a lighter jacketed bullet load in calibres such as 223 Rem.
Although I have never tried that myself.
An interesting powder to work with.

DC