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An observation from a newbe.
There are so many good powders to pick from.
Get a new/newer loading book and look at the loading data listed for your chosen calibers with interest in bullet weights and listed velocities. Compare your interests in that book, then do the same in several other loading books. I think you will find a pattern. Go from there.
What do I use, you say.
For pistols, I use 231 for everything from 8MM Nambu to 45 ACP and lead out of a 44. I actually use the same 5.6* grains of 231 for all loadings in my 45s and for 240 grain lead in my 44. That said I use other powders for some uses, Tightgroup in 40 S&W and from a protected 8 pound keg of 630 for my pet 240 grain JHPs in my 44 Mag.
For rifles, I have standardized with 748 for 223 Rem, 308 and 06. And yes I do use other powders for some uses, 4895 with heavier bullets in the 223 and light bullets in the 308. As I feed 308s to a M1A and 30.06s to M1 Garands, I load somewhat soft for the well being of the weapons and have found that my bolt weapons digest these loads well. This doesn’t mean that I don’t use 3031, 4895 and others to a lesser amount in these same cartridges and several other.
The point is if you want to limit your supply requirements to only two powders, you will have to make your own determinations and there are lots of choices. If you are determined to use only one powder, well, get a Lyman book and go with cast slugs. They will work.
*Just because I haves uses this loading does not indicated that others can or should. Always refer to one or more respected loading manuals and always use caution. It is better to error on the side of safety.
OSOK
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