an open powder keg is one thing. Ammo already loaded is and has never been an issue with the fire dept.
Even in a fire, loaded ammo may sound like firecrackers going off. But without a directional mechanism the lead is not projectile in nature because the shell explodes sideways.
As for calling my local fire dept for advice, forget it.
They are in most cases loyal to the establishment, protection racket. Advertising anything of a personal nature is opening the door to harassment by overzealous protectors.
http://www.freerepublic.com/focus/f-news/1889432/posts?page=140#140
I don’t know but I am thinking that 10,000 primers, loose, in casings or in loaded rounds is the maximum number that a person might be permitted to have in a residence if you are under the International Fire Code, CHAPTER 33 EXPLOSIVES AND FIREWORKS, Section 3306 - Small Arms Ammunition; there is a restriction limiting you to 10,000 primers, 20 lbs of black powder and 50 lbs of smokeless powder.
Just maybe, this is the kind of thing that could enable your insurance company to back out of paying for your home if it burned down.
It might be something to check into or keep your ammo dispersed outside of your home, limiting your inhome supply to the numbers given.