Well, I gotta confess I don't use HS-6 as my main powder in 38.
For that I
do use Clays, U.Clays, Red Dot, Bullseye, and currently, W231.
I just started loading some 357's, and have heard that HS-6 is good in that.
And it has been, I'm pleased with what my HS-6 357's are doing.
I have seen some data for it in 38, and figured, hey, if it works in two cartridges, great!
But, I think I'll stick to my other choices for clean, fast, 38's.
-Kframe