I'd hope that there isn't...
Let's see, if you stick one box in one kitchen cabinet, and another in another keeping them separate to a good degree, a box in your attic, a few under the house, one or two inside the air conditioning register, a couple in each closet, I suspect even the fire department would have too much to say about that. I'd be more worried about a bad wire or a gas leak then I would about the safety of .22 ammo. Why should any of us even have to consider asking questions like this? Where am I living? Bizarro world? Maybe...