Re: 9mm subsonic
I have a box of HST for self defense, but my shooting is with FMJ (cheap) rounds.
American Eagle (Federal) 147gr is OK, but varies quite a bit. I have 3 stovepipes in a box of 50. Some other rounds felt soft.
I also have some 158gr Prvi Partisan. It is a dirtier round, but more consistent.
So fat, I have only shot with hearing protection as other shooters were around. I slipped the muffs off for a couple of shots, but didn't get to compare the 2 loads.. (I started off to the side, but some guy with a .458 magnum slipped in next to me.)
I do need to compare them before I start loading my own. I intend to use the fastest burning powder for a safe load so I get less crap in my sealed can.