I've been shooting True Blue behind lead in my LCRx3 lately. It is a very fine spherical powder, pores/meters very well. Goes bang like it's supposed to. The max load in a 38 Special case behind 130gr lead bullets is around 6gr. That leaves a lot of room in there. I didn't concern myself with that - Bullseye is always that way. But - this powder burns dirty. Both soot and chunky stuff, something like light-load Unique used to be. The gun cleans up OK, but since I've been talking about True Blue lately I figure you ought to have this info too.