So, a new company coming into the biz needs at least a million bucks for startup costs, needs to wait a few months for the ATF to process the license (Type 06, 07, and 10 FFL's don't just grow on trees), find an insurer, find suppliers who have product available, hire people, and start production. By the time all that happens the buying craze will either be over, or BHO/Dems will have succeeded in outlawing everything anyway and driven the demand down to the point where your cost of production exceeds the price you can charge for ammo.
From another thread, primers are made by the ammo manufacturers, and they are using all they make for their own ammo, so there's none left over for sale. Primers will be in short supply long after the ammo shortage eases up, due to pent-up demand from reloaders.
Once things ease up (if they ease up), reloaders will (and should) buy and stockpile primers. You can cast your own bullets from scrap lead. You can re-use brass. If it comes down to it, you can make your own gunpowder. But if you don't have primers, you're out of luck.