I've not seen any here either. Maybe one of the walmarts that carries guns would but I don't frequent them often. I got a box of 45 ACP I have been scrounging for to test a gun with. They had 6 boxes of WWB and one of federal. 3 100 packs of 38 special and some other things.
Not only am I wondering what assault ban, but what panic? I remember checking the walmart amm counter for daily for weeks straight in 2008 and never coming up with any pistol rounds or"military" rifle cartridges.