I bought a lb of HS6 about a year ago as I was low on powder for 9 MM at the time and it was available. I don't load powderpuffs in 9 MM so I can't say how they perform on the low end. But I was fully satisfied with it's performance on the high end for 9 MM. I did use magnum primers with it too and it burned pretty clean from what I remember and shot accurately enough for me. I'm not a big believer in loading ultra quick powders in 9 MM with lower charge weights so I can get more rounds per pound, as it also increases your chance of accidentally double charging a case without it being immediately noticeable, so HS6 fit right in with my loading philosophy for 9 MM. Powder isn't the biggest cost in loading 9 MM anyways and you physically can't throw a double charge of HS6 in a 9 MM case without it showing up immediately.