If you’re worried about the black helicopter men this process may still leave recoverable data on your hard drives, although shocks tend to de-magnetize the data layer, severely damaging the information stored on it.
Some hard drives use ceramic platters; those shatter real purdy.
If you’re really interested in destroying the data you’d need some thermite or an industrial microwave. But if all you want to do is render the sneaky Petes’ ability to
shame you with all your old porn identity theft your checkbook infos, then wax slugs’ll do it.
Still, I would like to see the performance of various shot shell types against data integrity…