Thanks for the info.
It appears the powder is from de-milled LC ammo. The guy sold 4 8# jugs of it to our LGS along with a lot of primed LC brass.
I realize that $16/lb is more than surplus should cost, but it IS powder! I am going to try it using H335 data and starting at the very bottom end.
I know you can't tell by looking, but it does look like H335!
I will post results.