Working with a couple old bottles of Herco, so far in .38 spl, .357 mag and 9mm Luger.
I'm seeing some data where it's about grain for grain with Unique, though it seems to have a burn rate closer to Power Pistol. I put 6.5 grains behind a NOE 128 HP and liked it...then 8.5 grains under a 158 HP in .357. I'd like to push them a bit hotter, and wanted to know others experience with this powder (in moderate-to-warm handgun loads).