It looks like there are a lot of opinions, and a lot of good choices. 231 and the AA powders are sphericals, right? They sift through my Lee measures pretty badly. I have a Lee turret press set up for semi-progressive loading, and it turns out pretty nice rounds with consistent charge weights. I would prefer to stay with a flake powder, which keeps the bench a lot cleaner and wastes less powder. 700X, 800X and PB are flake types, IIRC, so I'll try them out if I can get a good price on a pound or two. Has anyone else tried American Select?
Thanks to all for the information!