This really happened... no sh*t.
After the Battle of Beecher Island, many surviving U.S. Army scouts forever had a hatred of the red man. Scout Pierre Trudeau and Jack Donovan, riding in advance of their command, had paused to allow their mules water themselves in the South Fork of the Republican River. They saw three stray horses and thought it peculiar. Suddenly, four Indians jumped up and three mounted the horses and fled. The fourth attempted to flee on foot. Having only mules, Trudeau and Donovan were too slow to catch the Indians on horses but they knew they could run down the one on foot. So, off they rode in pursuit. The indian zig zag as he ran, preventing the scouts from getting a good shot at him and their bullets struck on either side of him.
Firing a rifle, Trudeau hit the Indian in the leg, crippling him. After hopping a short distance, the Indian stops and gallantly makes a stand and tries to make the scouts pay dearly for their pursuit. He turns about and fires his Colt revolver at them. They fire back and he is seen to throw away his Colt.
Since Indians never showed mercy to prisoners caught on the plains, the scouts decided that no mercy would be shown to the Indian despite his being wounded and unarmed. After dispatching him, they recover the discarded Colt and discovered why he threw it aside. A bullet lodged between the barrel and the cylinder, thereby preventing the cylinder from rotating. Use only good ammo folks.
Now that's bad ammo!