HS-6 for sure is too slow for minor. you'll end up getting more perceived recoil since you have to generally use more powder by weight than a faster burning powder. it'll also be dirtier as I believe the majority of powders tend to burn dirty at lower pressures. Compared to .40 major, HP-38 is much dirtier in 9mm minor, so I can only imagine HS-6 would be pretty filthy. I haven't really tested this myself, but I've heard N320 is not very temp sensitive since it's single base (which is rare for most pistol powders). The downside is the price. It's about 50% more over HP-38[emoji24] Sent from my Pixel XL using Tapatalk