I can imagine that there are a great many different ideas, as to what is the proper or best safe storage containers for ones powder and primers. Better late than never eh? I purchased a used mini refrigerator yesterday for my powder. Probably around 3.5 or 4 cubic feet. My theory being, it has a factory seal, is insulated to prevent drastic temperature swings, and if a fire were to break out, the door would push open to where the pressure would relieve itself and have a minimal if any explosion.
As for the primers, I'm buying 4 plastic 50 cal Plano ammo boxes for separating the different sizes, and not having all primers stored in one area. The ammo boxes would be separated a few feet apart, as to not have the chain reaction effect if a fire were to break out. Powder and primers would be stored in the garage. Also, can anyone reccomend a good moisture obsorbent product to put into the mini fridge and the ammo boxes. I would be very interested in hearing what all ya'll use for your storage of powder and primers.