My top pick is H-335/WW748. Bl-C 2 is also quite good.
AAC 2230/2230S MilSurp also works quite well, and is often available very economically.
I avoid extruded powder altogether in 5.56 and 7.62. The spherical powders flow much more consistently in my Dillons.
I didn't fight to defend your freedom so you could vote to take away mine.
"A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself.
John Stuart Mill."