I would use the Hornady manual, which I believe lists loads for Bullseye and 231. I found that I needed to load at 1.09" instead of the 1.06 the manual had (if I recall correctly) to get proper feeding of the last round in my G34. You will need to adjust your powder charge if you are loading at a different length than the manual has, so hopefully, you have a chrono.
I used to use Unique all of the time in 9mm with the 124 XTP. But I recently switched to Power Pistol, and I can't see ever going back. Cleaner and accuracy at least as good or better than the Unique.