I do.
@Tomme boy alerted us to a sale on them a while back and I picked up a 6C for $26 or $28.
I've been using it in an 18" suppressed 357 Mag carbine using 3.3 to 3.5 grains of Unique. POI is dead on and produces very tight (one enlarged hole) groups at ten yards, slightly higher POI at sixty five and they open up to 1 1/2 to 2". Out of the 3" revolver, can't miss a 4" swinger at twenty yards, but haven't had time to really put it on paper. All very hurried and short shooting sessions.
PC'd or TL'd, either one, can't really tell the difference.
We've been having a problem with raccoons destroying things and getting rather bold when you try to run them off. These take the boldness out right quick.
Doubtless there are better powders, but this is part of an experiment. I'll eventually try HP38/W231, maybe Bullseye (don't have a lot of that left) and see how those do.