It is also not a good idea to store powder or primers in things like the military ammo boxes. You are creating a bomb when you do this if there was a fire. One of the best storage places I have found is in my basement in an old refrigerator that does not work. It is air tight and greatly fire resistant but if a fire was to happen and things got hot enough to cook off the primers or set the powder to burning instead of an explosion from being in something that would not let the pressure of the gasses escape before explosion it would just push the doors open. I put the primers in the freezer section and the powder in the refrigerator part.