Are you really worried about the law? It's your property. Do whatever the hell you want with it. In the unlikely event someone calls the cops on you for giving your new buddy (me) a handful of shotgun shells just deny it and demand pictures. If they provide pictures deny it again. If they say three highly trained government spies watched the transaction from the bushes across the street plead insanity and beg for forgiveness.
But by then I'll have the shells and and I'll have fled to Argentina. Shit, I didn't mean Argentina. I meant somewhere else.