Distraught Husband

An obviously distraught guy walks into a crowded bar, waves his gun and yells, “I have a .45 Colt Auto with eight rounds in the clip and one in the chamber and I want to know who’s been sleeping with my wife.”
The bar gets completely silent and no one says a word for an extended period of time. The guy fires one shot in the ceiling and repeats his threat, “Will the man who’s been sleeping with my wife stand up, or should I start shooting randomly?”
After another uncomfortable minute of silence, a faint voice from the back of the room calls out, “You don’t have enough ammo!”