For some strange reason, Remington is $750,000,000 in debt. Because of pressure from the political left, some major banks are not investing in anything to do with the firearm industry. Remington tried to restructure their debt but could not find the money. Having a major plant does not mean you can purchase supplies to operate it. Having major debt means you have no operating capitol and are most likely late in paying bills. Too much of that and no one will sell you the necessary supplies.
Another major problem for Remington is the current law suit which the courts have ruled can go forward. They are being sued simply for being the manufacture of a firearm that was used in a mass shooting. With that threat sitting there just waiting for a major hit, no one wants to help them. Who wants to invest, in a company facing hundreds of millions of dollars, in settlements.
As far as hoarding, Many serious rim fire shooters will buy large quantities of ammo just like re-loaders buy powder, bullets and primers. They want the same batch of supplies, pursuing accuracy. Send a rim fire rifle to Lapua for testing and after finding the best match for your rifle, you must buy at least 10,000 rounds of that batch. A serious competitor will burn that up in a year.
Of course there are those who really are hoarding for no good reason. They go into a Walmart and buy up anything on the shelf. They don't care that it might not be the most accurate ammo for their rifle. Just like toilet paper, those who had plenty on hand, bought anything left on the shelf, not caring if it was soft or thin or suited to their septic system. I saw signs in stores that stated "No Returns on paper products." Now ain't that something? When was the last time any of you ever returned a roll of toilet paper, for a a refund.
Lastly, folks have lost confidence in Remington. At a time when dealers can't keep enough inventory on the shelves, Remington is forced to offer prices that have been discounted to a new low and additional extra rebates, on some of their most popular models.