Some hard drives have glass platters and will shatter like an old fashioned ornament - everywhere in little pieces. So heads up for handling, eyewear etc.Shooting a hard drive? Y'know, they're mostly made of aluminum. I have, on multiple occasions, put a hard drive atop a stump and swung an axe, slicing it in two. I find that viscerally more satisfying than shooting them from a distance.
Maybe that's just me.