Have you watched a video on making primers? Appears they are in a room by themselves. Ammo plants are very automated these days so the social distancing thing is fairly easy to do.

Its similar to the 22 ammo shortage. They were cranking it out faster than ever only to still have a shortage. The shortage wasn't because of production but was due to people hoarding it. I agree with the statement that if someone sees it they will buy more than they need. That's how most all of these go.