Unique seems to be the gunpowder that everyone loves to hate. Several years ago, Alliant released the 'new Unique' which they claim burns more cleanly than before. In my experience, it is a bit more energenic than the old Unique. After trying Blue Dot, HS6, and several others, Unique is still my favorite for standard 45 Colt loads. I use 8.5 grains with a 250 to 255 grain bullet.