I walk into walked into the Walmart in brainerd this morning at 7:45. Shelves were mostly empty but there were two large cardboard boxes behind the counter and they were open just a hair. I saw some ammo peeking out at me. I walked halfway around the store to find someone to call the sporting goods person. To my surprise it only took 30 seconds for someone to show up. He opened both boxes and there was some 308, 30-06, 22 short, .380, and 7.62. I bought 6 boxes of 7.62 and left the other 14 boxes for others to get.
I also talked with the guy. He said these boxes had probably been sitting in the floor since the previous day but they are so under staffed that nobody had time to put the tax stamps on them and put them on the shelf. He said they automatically order all the ammo that is supposed to be on the shelf but it's really just a grab bag as to what they get. It gets rolled out on a pallet with clothes and food processors and everything else Walmart sells.
One more tip. If u go to Walmart.com and look for the ammo u want, it will tell u what stores have it in stock. I have found it is pretty accurate.