I worked for a sheriff in Arkansas who was infamous for entering a disreputable establishment. The only weapon he had was a double barreled shotgun.
Someone turned out the lights. He cut loose into the ceiling with one barrel when they refused to turn on the lights. They were slow so he fired the other barrel. At that point he realized he had not brought any reloads. Point is all ways have reloads available when using a weapon with a limited ammo capacity.