"You need to talk to the fire marshal"
Not!
That would almost certainly would not end well. And regardless of how much you have, and depending on where you live, they will forever have their nose in your personal hobby business.
On that note as well, I wouldn't boast or volunteer information to your neighbors regarding your hobby or the components. You may have a neighbor that doesn't approve of your hobby, which could lead to a visit from the officials demanding to inspect your home for hazards that put your neighbors at risk. I had a run in years back that was in fact initiated by a neighbor that felt I was putting them at an increased risk due to my hobby. In that particular incident, and considering the state I live in, I simply refused to allow them in my home. Not having any evidence to warrant a search of my home, they resorted to badgering me for a few weeks, employing various tactics to gain entry. But in the end they just issued me a verbal warning, that I may be liable for damage or personal injury if something happens. I learned my lesson to keep my personal business, personal.
I realize there may be serious financial repercussions at the least, if, heaven forbid your home catches on fire. But considering how difficult it has been to obtain powder and primers, one is almost forced to stock pile both to some degree, just so they can continue enjoying this great hobby. So IMO, hope your home doesn't catch fire, and if it does, don't volunteer information, other than to inform the firemen that you have reloading supplies in your home, but omitting the quantity. And if asked how much, I would just reply that you really don't know, some of this, and some of that, and let them know which part of the house or structure they are stored in, that should be sufficient to give them a heads up.
My closing thoughts are this, if someone really like reloading and treats the hobby with good common horse sense, they shouldn't have a problem. OTOH, if someone stores their powder and primers next to the water heater in the utility closet, reloading may not be the hobby for them.
GS