Lest you forget... I've also noted you talking about choosing a particular powder for certain uses because of its low muzzle flash.
But you just managed to put a sandspur in my Army boots... As far as I can tell there is no Universal separate/distinct/different from Universal Clays. Clays, just plain ol' Clays is a thing in and of itself. But even Hogdon seems to sometimes call Universal Clays, just Universal... leaving off the Clays. This causes almost as much cognitive dissonance with me as there being Hogdon (H) and IMR (IMR) variants of several powders with the same numbers and the twain not coming up at the same place on the burn rate chart as well as having different min & max loads. This hand loading stuff is not only not for sissies, it's not for the dyslexic nor for blasé or the easily confused. For something that should be so clear and simple, the people who name the powders damn sure don't cut us any slack!!!
Now, I am... am I or not... correct about Universal and Universal Clays being one and the same thing? If I'm not I sure have squandered a lot of obsessive double-checking.