stuff Colt's "mad men" came up with to try to get idjits to practice simple safety with an SA revolver.
Simple safety is something that has evolved over time. Carrying with an empty chamber under the hammer is something that developed due to the Colt SAA, and was something "new" people had to learn, and many never did.
Colt's cap&ball pistols can be carried loaded with six, because when the hammer is down in the "safety" position, its is between the nipples.
Early on, Colt called the first "click" position of the SAA the "safety notch" and did advise people it was a safe way to carry the gun. As far as I can tell, they STOPPED doing that after a little while, and only recommended an empty chamber under the hammer.
Why did so many of the old time cowboys limp???
Because they had "Colt leg"..
Happened A LOT, when the SAA was loaded with six. Toss the stirrup up on the saddle so you can cinch up the saddle girth strap, horse shifts, stirrup slides down, hits holstered pistol on the hammer, gun FIRES!!!!
(usually hitting the leg or foot)
Colt leg
Can't happen if there is an empty chamber under the hammer.