I have recently started using Power Pistol in place of Unique, although I still like Unique. I have found very good loads for .44 Special, and .45 Colt, and am still fine tuning a 200 gr. LSWC load for .45 Auto. I have not noticed any extra flash, but I shoot outdoors. Power Pistol is cleaner than Unique, and drops charges out of my Lee Auto Disk that exactly match the Lee charge/volume table data. Unique always throws way under the listed charges, so I have to keep my own table data to know which cavity to use.

Another benefit of Power Pistol is higher velocity at lower pressures. For this reason it seems perfect for loads from mid-range to full power. I have not tried it in any reduced or light charges, because I just don't think it's made for that application.