Found the same at our local Walmart when I was there on Christmas Eve. There was NO ammo of any caliber that would feed a semiautomatic firearm.
Even better. The guy at the sporting goods counter said they had put 4 Colt M4s out on the shelf for sale that morning, and every one of them was gone within 45 minutes.(they are getting in the good 'LE' models) He said they are ordering four of them every day, and are still getting them in, and they aren't marking them up like crazy like everyone else. (remember folks, if you encounter one and done have the cash on hand to pick it up - they DO allow layaway on firearms)
I was at a hunting store yesterday. As was the case at Wal-mart, the 410 shotgun rounds were depleted. Must be a lot of us with Taurus Judges.