Dude have you ever heard of the term "cold start" ? The logistics chain etc for such an operation is massive.
Plus even if they are producing ammo, it's like trying to fill a drinking water reservoir by pissing in it. If they keep pissing 24/7 for a few months, you might see some
accumulation... but its going to take awhile.
It's all this f***ing corona bullshit, IMHO. Lots of facilites were basically closed for a month, sometimes longer, or production cut way back for those times. Some still may not be
at full output. So you have like 2 months worth of lost production (March, April) which correlate to peak demand for guns in america in like our lifetime.
The fact that this wasn't a lot worse, sooner, is actually some kind of a f***in miracle, actually. But there are a lot of input factors into the general malaise here.