Decades ago a friend was complaining about all the various powders he was using. Quite a few.
I looked up loads for everything I was and wanted to load for and decided that for me I could use just Unique. It works well in my rifles and revolvers and is particularly well suited for really old military rifles. So I started buying just unique.
I've got 120 pounds of it in the garage and another 16 pounds on order. I've probably shot up 80 or so pounds in the last couple of years.
Old or new, works just as well.
I've probably put 20,000 rounds through my 44 magnums. I can look up the charge if you like but I think it is around 9 grains.
So I love it!