I know only one person that likes HS-6 for 9mm and he is getting good results. However, he is loading to the point that many of his primers are "flatten" by over pressure. A bit too far for my comfort level. CFE-Pistol seems to get the velocity without the exposure to over pressure. Probably should also look at Winchester 572 as a "clean" and "modern" alternative to HS-6.I guess I'm the odd man out here. I never did have any real luck getting hs-6 to work for me in my nines.
From what I've read here, there's a good chance that I was just loading it too light.
As it happens, my go to in it's place is titegroup. Anything large bore and I'm leaning towards unique or blue dot.
Since I only have a pound or so of hs-6 left I may give it a second chance with some 38 loads or maybe 9mm super.