my local walmart had a sign up yesterday, said all ammo purchases are limited to 3 boxes total, per customer, per day. I don't know how they're stopping you from buying 3 boxes, going to get lunch, and coming back in an hour to buy 3 more, but I did see more available as a result.
prior to the policy, all they had was birdshot, some .22 and some "odd' rifle calibers like 7mm, .300 winmag, etc.
yesterday they had some .45LC, 30-06, .38spl, and .380
with any luck, the new policy will allow the ones who DO go target shoot regularly, to buy 100-150 rounds for a trip to the range without having to delete their home inventory