Ammunition not a danger in fire
This video, which I must have seen three or more years ago, really stuck with me because it shows just how undangerous unchambered ammunition is.
In it, they try every possible way to create a hazard. They shoot cases of ammunition with high powered rifles. They run over piles with bulldozers. They set huge amounts of it on fire.
Watch this from the 12:20 mark for a bonfire with 20,000+ rounds set on top.
There are pops, but nothing penetrates both layers of a sheet rock wall (in fact, there were almost no penetrations and the second layer of sheetrock was never dented.
So, out of all the worries, Adam, we can scratch off errant ammunition cooking off as one of them.
Please keep us updated on the fires and how you are managing them too!