Stacy raised his gun, fired, and landed one hell of a shot – by his estimate “a good 165 yards” – with a pistol (we do not know the make or caliber at this time). Stacy wasn’t even sure if he could make the shot at that distance: “I hope this magnum bullet’ll hold up, you know, this distance. And sure enough it did and I hit him in the thigh.”
My hat is off to the gentleman.
UPDATE: The gun was a .357 Magnum. More info here.