I knew a guy who worked in a beer joint that killed himself with a .25 semi-auto pistol in a game of Russian Roulette that was used to shock new patrons on regular basis. The guy who owned the place and the help were convinced the firing pin's action was worn out.
Ol' Dave tried to pull the trick on the pre-lunch Alky crowd one Saturday morning. That low powered bullet went in one side and bounced around, it didn't have enough punch to come out the other. At least he died quick. More proof Darwin was right.