Stopped at my local Walmart today, they had lots of .223: Federal 100 rnd value packs, Privi Partisan 20 round boxes and others must have been at least 50 boxes all total (I didn't stop to count them), the usual hunting calibers .270, .30-06 so forth, some pistol ammo mainly .40 S&W, lots of varying types of shotgun ammo mostly 12GA and some .410. They had some 00buck in 25 round brown boxes marked:
NO. 00 Buckshot
I'm guessing it is standard Winchester 00 in a plain Jane box with fancy markings.
I snagged 2 boxes of the Federal 100 round value packs ($40.97/box) and 1 box of the 25 round box of 00 buck ($23.97/box). The gun cabinets were well stocked, had 6 AR's, 2 Colts, 2 Sigs, 1 Wyndham Arms and one AR I couldn't ID (is DIA an AR manufacturer?), plenty of bolt actions (Savage, Remington, Ruger), several shotguns, they also had a Beretta CX4 (?).
But not a single round of .22LR!