Had a tough time finding this one, and have never seen another. Elmer Keith referenced this gun club in his chapter in Sixguns covering long range handgun shooting.
The Louisville Rifle and Revolver Club ran these shoots. The competitors used the standard one-hand position and regularly managed to hit turkey silhouettes at 300 yards by the fourth or fifth shot in the cylinders.
Their rangemaster was a tough old bird who carried a cane, not so much to help him walk as to sound out the competitors. The cane would tap over the bodies of the shooters and would unerringly lift the bottle of "Red-Eye" out of the back pocket or flick the morphine syringe (!) out of the vest pocket, and these performance-enhanced contestants would be banned from the line.