Guys,
Forget about bans for a minute. A legislative ban probably isn't the "SHTF" this thread is asking. If you are worried about bans, get involved in the Activism section.
I've said this in many threads... I think the term "SHTF" is applied far to broadly. To me, Legislative action, muggings, my car broke down, etc... is not a "SHTF."
I suspect that the OP started this thread referring to a TEOTWAWKI (The End Of The World As We Know It) where we all wear spiked football armor, drive beat-to-hell oil-smoking vehicles with rebar welding all over it, and fight off mutant zombie squirrels all day ala' Road Warrior.
(I'm having a little fun... OP, I'm not ripping on you.)
At any rate, I DO have access to a few Black Powder firearms, and it could be a good idea if you believe that we could have such a collapse that would merit it. After all, in a total collapse, I seriously doubt Wal-Mart will be stocking your particular brand and caliber. I doubt Winchester will be producing that much-- and would be unlikely to be doing so in the foreseeable future.
So the ability to have a firearm where you can cast your own bullets and make your own propellent is could be a good idea in such a scenerio.
But this occured to me...
So many people around here have modern muzzleloaders that take caps or shotgun primers as ingnition. This seems to be the weak link in any Black Powder planning. I personally don't know how to make a primer-- and although I've seen instructions on how to do so-- I understand that making primer compound is/can be VERY dangerous (forget the legalities for a moment. The police aren't coming in the zombie world.)
It seems to me that if you are REALLY worried about this, you'd be looking for a Flintlock. That seems to be the most logistical self-sufficient rifle platform if we wind up back in the Stone Age.
That said, I am probably screwed....
-- John