Simple enough to try. Get a hot plate and a cardboard box about 6" higher than the case and set the case on the hot plate. Put a pipe or "barrel" around it if you want. There will be a "bang/thump" as the primer/powder blows and the bullet hits the box. Not too impressive OR dangerious. No handgun bullets (.45ACP, 44 Mag, .357 Mag) OR rifle bullets (.223, .308, .30-06) put more than a dent in the box at six inches. At eight inches higher than the case, the bullets didn't even hit the box in most cases (pun not intended, just lucky) and none dented the box. Anyway this will let you watch and not blow up a gun.