Gentlemen, Thanks for your replies, all. If you will check around the Internet, I am indeed a "member in good standing" on quite a number of firearms boards. I am not new to firearms, or reloading - but in calmer times, I could afford - and actually purchase - any powder I needed for a specific cartridge or load, and sometimes more than one, per caliber. (Since my IPSC days, I got out of reloading - but it may be the only way to get some older or obscure calibers of ammo, soon. The less popular, slower moving rounds are simply not going to be produced in a time of crisis, folks.)
Currently, I know of no where here in America where any of us can walk in and buy any powder we want. Thus, if I am going to stock up and purchase quantities when they became available, I was curious if the more experienced loaders, currently, might know of the most versatile powders. We are in a time of shortage, friends.
By the way, I don't quite understand ANY connection between an "Armorer" and "Reloading". An Armorer (not the same as a gunsmith) generally works on Law Enforcement and/or Military Arms. ALL of the general purpose ammo in these two worlds is supplied by the agency/department and reloading of empty cases is a rare occurance, indeed, due to the modern legal/liability concerns of governmental bodies - it is usually FORBIDDEN to use reloads in Department/Agency firearms. I do not currently work for any arm of the Government, but I was a cop at one time, and a Reserve Sheriff's Deputy before that and I know their rules.
Now, if that is not enough comfort to the suspicious minds here, let me give you something more real to concern yourselves with:
Note: For those of you who really just want to be a little Paranoid, or who truely enjoy worrying - An obviously .gov DHS type (way better dressed and younger than the rest of us, standing in the very middle of a crowd of fifty+ partriotic, older Americans) attended our peaceful, local "Day of Resistance" 2nd Amendment Rally, and rotated his cell phone in the middle of to be sure he got good video of everyone's faces a couple of weeks ago. There, now you have something besides me to worry about!
While at my local gun emporium tonight, I looked in one of the NEWEST reloading manuals, and found that the Vitavhori (sp?) N 150 has loads listed for .223, .308 and .30-06 - and bought a pound to try in .223. So this powder seemingly will fulfill the need for a "universal" powder for those calibers. But wait - there is no "gas gun" data specifically called out - port pressure could be way off. Well, back to the books. Please let me know if any of you find better answers - and I will do likewise.
Thanks again, Col. Colt
PS - Relax.