Moosehunt said, "About 45 years ago, I thought that having one, or a very few powders would be the way to go. Now, even trying to be conservative, I still have well over a dozen powders on the shelf and use 'em all. It's a good idea that just don't fly!"
I agree, but H or IMR 4895 and Unique will take care of most, rifle, pistol and 12, 16, 20 and 28 gague shotgun loads IMHO!