I like to use HS6 in mid range 357 magnum loads, mild 44 magnum and top end 9mm loads. My experience with it shows that when loading minimum loads with it, it tends to burn dirty. Load it more toward max listed loads(higher pressures) and it burns much cleaner. Its one of those powders I intend to always have on hand; if I see it available in a store, I'll grab a pound of it.