Here in SoCal, I can find powder, but with no consistency of brand or formula. So we are forever working up loads and taking lots of notes.
It seems that the most available powders here in San Diego can be used for shot shell or pistol loading. That versatility might be the reason the stores are buying, to keep inventory lower? Not sure, but I will say that I haven't found a powder I hate yet.
Most recently, for 9mm, .38 spl, and .45 acp, I have used:
Autocomp
800x
True Blue
All we perfectly acceptable results.