How Much Ammunition Should You Own?

I think he shot about a hundred in the first three minutes, which, by the way, means that he was deaf. There's no way you can fire that many in tt at that speed still be hearing things that are going on around you. And as the question is, in what context does it make sense to own thousands of rounds of ammunition? If you're a non maniac? I guess i forget who expressed this idea somewhere recently. You could exempt shooting ranges so that you could actually go to a range and shoot hundreds of ounds at normal expense. But there'd be some way to insure that people couldn't take hundreds of rounds away from a shooting range.