HighDesertWolf ,
No, Unique is not a slow burning powder compared to Blue Dot or 2400!
But 2400 is not a recommended powder for the cartridge you mentioned!
And while Blue Dot is, that does NOT alter my original post. But if you disagree, march on forward and good luck!
I have 30-yrs experience with this cartridge, 10 of which in national competition. I realize that my experience is irrelevant, so you just go your way! I only hope you don't hurt yourself or your firearm in the process.