Used to be all I'd use. But got tired of the sootiness of it and it burns inefficiently. Lots of unburnt powder out the bore. Its the only powder I have that flashes out of my comps haaha. If you're running longer barrel then its better. It tends to like higher pressures but even then its still dirty.
And I know this has been argued before but I actually have an email from hodgdon to back up that hp38 is identical to 231. So buy hp38 and have a few bucks saved for bullets.