Pretty much everything is mostly unobtainable, save for some of the more exotic stuff - such as 7mm Mag, Weatherby calibers, 458 Winchester - stuff that generally costs alot of money anyway - but once those are off the shelves, they won't get refilled quickly. Anything that is "common", such as 9mm Luger, 223 Remington/5.56NATO, 308 winchester/7.62x54, or even 22LR gets sold out within minutes of it showing up at stores. The ammunition companies are putting on 3rd shifts, and still can barely keep up, and people are paying ridiculous prices (up to +500% above "normal", from what I've observed) for boxes of ammo.
One of my local stores still had large rifle magnum primers, but that was all they had. I think that until the gun control controversy calms down, one way or the other, it will continue to be crazy. On the other hand, if more drastic restrictions are put in place, people will probably continue to buy ammunition like they are preparing for the apocalypse.
I don't like to mail order primers or powder because the hazmat fees generally double the price of my orders, but I may have to "bite the bullet" if I want to go shooting my revolvers or lever action rifles.