My Dad hangs out with a bunch of old farts at the local coffee shop. Most of these guys have not fired a shot in years with any of their guns. As soon as there was talk of a shortage back in Dec they all had to head out to find whatever ammo their old guns used and stock up.
Because ammo is going to be short, don't you know?
This shortage seems to be fed by a variety of fears, and the way things have been lately, some usually rational folks seem pretty afraid.