Ammo is not a problem for firefighters.

this was the construction and plumbing business I worked for 25 years ago.
I had done the majority of the electrical work for the previous 2 years on the building , I got to work with the fire inspector for 2 days digging up boxes and reconstructing the electrical system.

one of the first questions the fire inspector asked was were there any clocks with metal hands I could think of one , the boss/owner was into flying he had a Gulf Aviation fuels clock in the office up stairs metal sided wood frame pole building with offices up stairs. he was particularity interested when I told him it was neon around the outside. well we did find that clock hands stopped at about 4:20 am it was ruled the cause of the fire. Neon has a way of catastrophically failing when it burns out. the fire was not noticed till almost 6 am when it had hit the paint cans down stairs and they woke the boss who lived about 100 yards away.

sent a lot of firemen to the hospital , PVC when burned is bad stuff cyanide poisoning , when your a plumbing outfit we had a whole wall just for pvc fittings and racks of pipe outside against the building.

most of the filing cabinets actually held together but they fell on racks of shelving below the couple that had a strait fall and hit the concrete busted open

I used to burn the trash at the range , it was surprising how often there was ammo in the trash,

generally the fire in the 55 gallon barrel would be going a while , really burning hot before rounds cooked off

it made me uneasy and I would stand a good distance off but I never once had a bullet hole in the 55 gallon drum , with no chamber and barrel the pressure is released as soon as the bullet pops loose.

even a cheap 15 or 55 gallon steel drum to put ammo in and set a lid on it would give it a decent amount of time and protection

Here's a couple pics of the genius amazing work. Taken last evening

The longer you look the worse it gets.
2nd and 3 rd pic I had put wire nuts and taped off because they were exposed live wires that were inside the wall.

Little update:
The fire revealed a lot of sketchy work done by the previous owner. Exterior wall has got to come down the remaining kitchen walls aren't framed correctly way over notched and bored out including load bearing walls and the list keeps going. I have all construction trades coming tomorrow for a game plan

Questions for those in the trades.... have you ever seen a load bearing wall where the 2x4's are cracked horizontally? 1 part of a wall is carrying the carrying beam with 3 2x4's nailed together but 1 of the 2x4's had several horizontal cracks. The carrying beam is 3 2x12's. I'm thinking this is significant.

Also, how significant is undercut rafter tails? I can't find anything in the code about it. I have several rafter tails exposed because soffits were torn out. Some of the rafter trails are cut upto 8" short from the fascia area. Other tater tails were"trimmed" to be flush with the beam the fascia is nailed into.