"If the world suddenly turns sour lets all go over to boone's place and hold up for the duration." OV-D1
We all nominate you to be the one to knock on his door.
I just squeaked in an order for 1100 rounds of .44 Mag cowboy ammo. That might sound like a lot of ammo to a non-shooter, but at a rate of 100 rounds per match (50 in single-action revolvers, 50 in a lever-action rifle) and 3 area matches per month starting in April, that will get me about half-way through the season if I attend most of the matches and don't practice.
Is there a statute of limitations on hoarding? I've got a few boxes of .22s I bought in the 80's and stashed in the back of the closet, including a carton of CCI Stingers. I also have a box of .38 Special Speer shot shells (my Mom moved to rural Arkansas and there were poisonous snakes in the area).
I think stocking up when supplies are plentiful, even for long-term storage in "prepper"-quantities isn't hoarding. When supplies are tight and you buy the shelves clean, that's either hoarding - if you hang on to them - or, profiteering - if you turn around and sell them for a markup once you are the only local source for buyers to turn to.
Mel Tappan, in his classic 1992 book "Survival Guns" recommended stocking up on .22LR ammunition for use in bartering for goods, in addition to owning a generous shooting stockpile of the ammo. I think that may be in the back of the minds of more than at few purchasers.