i have. they are a marketing gimic and they do not produce more velocity and they are not cleaner. i have some on hand that i tried. they were accurate but no better then 777. infact its the same thing. made by hodgedon sold under IMR. read chuck hawks article on white hots. its a harsh truth that bums alot of ppl out. the cleanest powder ive shot so far is bh209. its head and shoulders above all other powders. even the swiss stuff which is pretty damn good.