I don't ever recall getting ammunition in a box marked with the word "ammunition" or an ammo manufacturer's name (Winchester, Blazer, Federal, Fiocchi, etc) shipped to my home.
Even reloading components (such as lead bullets) aren't marked as to what's inside.
(but maybe I order mine from different places)
I get boxes from MidWay, Grafs, Cabellas, BassPro, Gander Mountain, Able, Natchez, and many others - but none of them that I get have anything "gun related" printed on the outside of the box.
Well actually, I don't RECEIVE ammo from MidWay, I just drive the two miles there to pick it up after my phone order, but none of their boxes say anything about ammo on them... Just MidWay.
(but MAN'oh'MAN you should see the caravan of "Brown" trucks there, and LOTS of those drivers have sour looks and moustaches! OH MY)
Good thing I can "carry" there....