Gunfighting in the old west  from Cattle Kingdom by Christopher Knowlton.

“But it was no accident that [legendary lawman and showman] Wild Bill Hickok chose to carry a sawed-off shotgun to defend himself after [a] shootout … in Abilene. A shotgun was a much better weapon than a re­volver in a gunfight, and it easily surpassed the six-shooter as an aid to law enforcement.

Gunfighting in the old west