The thing that really bugs the hell out of me is that there is no carve out for a storage area outside of a residence. For instance, why can't I store more than 5 pounds of powder in a tool shed a specified minimum distance from a dwelling?
I guess it comes down to the legal definition of "possess" and "store" as applied to this law. For weapons, IIRC, you're "in possession" if the weapon is on your body or in your immediate physical domain. Otherwise the you'd be unlawfully in possession of a pistol, while at the grocery store, of a gun that's back home in your safe. Then again, maybe I shouldn't be giving the MDAG or AACO SA any ideas.
The scope of "store" is ambiguous, too.