I've also read you can mix up some of the primer compound and re-prime cases.
Primer pellet compound is a blend of lead trinitroresorcinate (lead styphnate), sulfides, and other nitrates for oxidizers. Other high explosives like PETN and mercury fulminate have been used. They're a magnet to the feds. My guess is you would get vanned and hogtied just for thinking of such an act since all of our phones have been secretly installed with super high tech doo-hickeys by the NSA to read our minds. Free thought is a crime nowadays.
The stuff to do it IS available---or at least it was up until about about two years ago, the last time I communicated with a friend who was trying it out. Evidently, getting the priming mixture distributed evenly around inside the rim is the hard part. He experienced many misfires and was quite discouraged. I believe he has given it up.
Still, knowing that it CAN be done is good. Being in a situation where you
must do it is something else all together.