Cocked and locked on a holster that between the hammer and pin. Hammer down is not entirely safe from incidental bumps or drops.
I have carried my 1911 for well over a decade. Same gun. Always carried cocked with thumb safety on... until this past Sunday. Unholstered and got in the car, placed the weapon on the passenger seat and went home. Grabbed the gun to go in the house and noticed the damned safety was off. Don’t know how it happend and I’m not sure WHEN it happend. I consider myself very lucky and I have begun carrying with the hammer down now.
“Hammer down is not entirely safe from incidental bumps or drops.”
On revolvers since the early 1990’s it is. They don’t have a direct firing pin on the hammer. Take a look at one. The hammer if flat. The trigger must be pulled for the firing pin to come in contact with the hammer.