Unique has the advantage of buring well at high pressure (full power) and at low power (target load). That is what makes it "Unique". It does not meter well in some powder throwers. It does not work in my Redding BR 30, for example.
Another powder that is similar to Unique is IMR 7625. It is quite bulky, too, and I have made very good target and medium power loads with it.
I am looking forward to finishing my 5 pound can of 231. I find very, very dirty.