The "Other" Unique.... Universal.
You'll use about 0.5gr less than with Unique to get same speed. I use 8.2gr for just under 1,000fps from my 4-5/8" BlackHawk.
I arrived at this charge after trying a variety of powders through my WinM94 "Legacy" w/24"bbl
I was having problems with case obturation and when it didn't, a lot of "whiff" of gas blow back around the case and associated fouling.
With the 8.2 of Universal, I don't get that and lacks some of the "soot" of Unique.
Don't get me wrong, I like Unique. Been using it since 1970.... But it takes close to or just above 9.0gr to get same results and it's still a tad dirtier than the Universal...
And I don't get the "sticky" extraction of the same velocity/accuracy with HP38/Win231... Bullseye also gives sticky extraction from the l/a, even though with 20.0gr of #2400, I get over 1,700fps (24"bbl) and still decent accuracy. (Lee 255gr FNGC; w/w metal w/95-5% lead-free solder added and sized 0.452" w/SPG lube) I don't.... go figure...!