Where can't you get them! There are dozens if not hundreds of places online to buy mil-spec ammo cans. Gun shows are probably the best place to get used ones cheap. Or you can find them in any number of brick & mortar stores ranging from sport/outdoor establishments (Cabela's, Ganger Mountain, etc.), local gun stores, Army Surplus stores, to Walmart or even hardware stores.steel ammo boxes? where does one get those?
The ATF has done some really good tests on this. None of us would want to be in the same room as a case of ammo that is on fire but it's far less damaging than most people think.No, steel cans are not necessary. Ammo poses no threat from flying bullets during a house fire.