The ammo is out there, like the author says. (Local gun show had plenty). And it’s expensive. But I view it like cost-averaging a stock, I buy a bit every month. It’s not going to get cheaper anytime soon.
Interestingly, I've talked to very few people that are truly worried about ammo becoming unavailable due to changes in the law. People are buying up weapons and ammo because they are expecting an event that will require the items to be in their hands immediately, not available in 2-3 months. More ammo is being produced now than ever before in history. Where is it going? Not all to gougers, as that inventory is limited and they know they are in danger of losing big if they get caught holding it. Just as fast as the ammo is produced/imported, 60-70% of it is being packed away into the closets of red state Americans.
There are now millions of dispersed arsenals all over this country. Constitutionalists are practicing Swiss military tactics, and they don't even have to be instructed to do it.