For shotshell reloading, I have almost universally used Hercules/Alliant powders.
I did too until their self induced shortage a few years ago when their products were unobtainable.
As much as I hate buying from the modern day version of 'The Powder Trust' (Hodgdon) I discovered Titewad.
It's great stuff, and the best thing ever made for gas automatics. That's not important to most here but it is to me. It works fine with W209's, which to this day still have about a 1 in 5,000 failure rate. Fiocchi does not.
I started with Fiocchi 616's when the price of W209's went way up, and see no reason to not use them with flake powders.
Fiocchi in general makes very good stuff.