I buy ammo at our local and area gun/sporting goods stores. The ONLY thing I buy at Wally World (on a very rare occasion) is sliced cheddar cheese and in an emergency a printer cartridge (while my online order is coming).
Anyhoo...a few weeks ago my wife bought some .410 shells for her Taurus Judge at WW (we had a little discussion about this...lol). Shells were too long. When I was in the vicinity of a WW I took the wrong box of shells back to exchange or get a refund. "YOU WANT A REFUND?? WE DON ACCEPT RETURNS ON AMMO!" Doesn't surprise me a bit. When I got back home, I traded the wrong box from WW for a correct box at our local gun shop...no problem...
While at WW, I did swing by the gun department...about only thing on shelves were some rifle ammo and a few 12 ga shotgun shells. This was one of their "SuperStores".
Moral to this story: "Buy Local at your Friendly Gun Store" At least they will treat you right!