RO1 p 18 item 6.
Revolvers are returned to leather (re-holstered) with hammer down on a spent case or empty chamber at the conclusion of the shooting string, unless the stage description specifically directs otherwise; e.g., ―move to next position and set gun on table or prop.‖ A shooting string is defined as shots from one type of firearm prior to the next type of firearm engaged. (Gunfighters may choose to shoot five rounds, safely stage their loaded revolvers, hammer down on a spent cartridge, shoot another firearm, retrieve the revolvers, and finish the ―"shooting string" before reholstering.)
The string ends when you transition to the next firearm. You may go back to correct errors prior to firing the next firearm.
Penalty RO1 p 27 under 10 second penalties, Prodecural Penalties
Not returning revolvers to leather unless otherwise specified
So unless the stage instructions allow a non gunfighter to stage the first pistol, the shooter earns a procedural.