A lot of the younger actors hadn't shot a pistol, didn't know how to ride horse.
From the time.com
The large-caliber wisecrack, like the horse pistol, is part of America's past.
From the time.com
Bierce's unlikely benefactor is an old Confederate veteran with an ancient horse pistol in hand.
From the washingtontimes.com
For instance, in one scene, where he was to be hanged after a pistol was fired, the horse underneath him was supposed to bolt.
From the en.wikipedia.org
For some unknown reason, Pollitt produced a pistol and then ordered the men to unload the horse from the trailer, Detective Sgt. Jeremy Murrell said.
From the kentucky.com
She procured a second pistol from a friend in town, and then, removing a horse from its shed behind the hotel, she set fire to the shed.
From the en.wikipedia.org
Meanwhile, St. George, riding a 900kg horse named Rio, attempts to kill the dragon with various lances and a sword before resorting to shooting it with a pistol.