It has to something about what part of the country you are from because up here in RI we have all the ammo you want.One local shop has it piled up on the floor waist deep,in all calibers.That goes for powder and primers too.
We usually just shop at gunshops as we have quite a few for a small state.Nobody I know would even think of buying ammo at Wally world.It'a just not a store that sportsman shop in, in New Englandicon.I noticed when I go down south people seem to like the store,up here it is mostly a minority junk store.