Way of the Lawless by Max Brand

At the same time the rifles of the two men of the posse rang, but they must have seen the fall of their leader, for the shots went wild, and Andy Lanning took off his hat and waved to them. But he did not flee again. He sat in his saddle with the long rifle balanced across the pommel while two thoughts went through his mind. One was to stay there and watch. The other was to slip the rifle back into the holster and with drawn revolver charge the five remaining members of the posse. These were now gathering hastily about Bill Dozier. But Andy knew their concern was in vain. He knew where that bullet had driven home, and Bill Dozier would never ride again.

One by one he picked up those five figures with his eyes, fighting temptation. He knew that he could not miss if he fired again. In five shots he knew that he could drop as many men, and within him there was a perfect consciousness that they would not hit him when they returned the fire.