Tightgroup is good stuff. But I guess old habits die hard. I too started with Unique almost 20 yrs ago and have stuck with it ever since. Far too universal. Shotgun, .38, .45Colt. .45/70 and now my 9mm. All I have to do is buy one powder and I am set. As far as dirty...uh, huh. But when I shoot cowboy loads it is considered the smokeless "black powder."
But I too clean my stuff after every shoot so no big deal. And I like the way it fills the case. Really important for those big .45Colt and .45/70 cases.