Hmmm.... maybe that's why I have had such insipid and disappointing performance from Unique. In the .45ACP loading, my M1991A1 got gummed up and began to fail to function after three magazines full, and velocity on my Chrony clocked in 100+ FPS slower than listed by Alliant.
In my .357Magnum loads, it also burned very dirty, gumming up the extractor star and eventually causing failure.
From reading of others extolling Unique's virtues, I began to suspect my loads were simply too light. Luckily I only had one pound - not so much of a loss when I dumped the 'flamable dirt' onto my GF's flower bed......
Switched to Bullseye for most handgun loads, and Hodgdon's Lil Gun for my .357Mag loads - been very happy ever since, and now have twelve pounds of Bullseye!