Others may disagree, and I'm sure some will, but stay away from Unique. Many have found, including myself, that target loads of Unique can result in squibs.
I suggest you use the 148 grain Hollow Base Wadcutters for target loads. They have proven time and again to be the most accurate for light loads. As far as Powder goes, 2.7 grains of Bullseye, 3.1 Grains of Win 231, 2.8 Grains of Clays or 2.7 grains of 700X. Accurate #2 is also supposed to be very good, but I haven't worked up loads for that yet.