I have often wondered about "reloading" primers. I've done it, but I haven't actually tried a "reloaded" primer in a cartridge yet.
Here's what I did:
I popped the anvil out of the cup and, using a broad-pointed punch, pounded out the dent in the primer cup.
Then I trimmed a cap, like we used in our "cap guns" when we were kids, so that it would fit in the cup.
After seating the cap in the primer cup, I re-seated the anvil so it would hold the cap in place.
I seated it into an empty case, but added no propellant or bullet. I discharged it in my S&W 27 with a 6" barrel. It worked, and I could even see a spark come out of the muzzle.
Things have not gotten desperate enough for me to actually try it with a loaded cartridge.
I hope my posting this does not cause a panic-buying spree that keeps our kids and grand kids from getting the "bang caps" that they need!