I've always used my hammer stalls on my flintlocks. They are a Safety that simply can't be defeated, without conscious movement.
On a stand, sitting or standing, I carry the gun with the cock on the half cock notch, or lowered so that the flint bites into the stall. When I need to cock the gun, I put one side of the gun against my stomach, and my other hand over the lock, as I release the sear from the trigger, by holding the cock with my thumb, and pulling the trigger back. I hold the trigger back and cock the hammer back, release the trigger, and lower the hammer into the full cock notch.
NO NOISE What-so-ever.
My fore hand wrapped around the lock does more to conceal the small movement of my thumb and trigger finger than to muffle any sounds, but it will do that, too.
I have done this with friends standing as close as 6 feet away, and while I could "hear"?( more likely "feel" the click vibration up the bones of my fingers, hands, arms, etc.) the slight click of the sear coming back over the half cock notch, They could not hear it at all, not even when I asked them to listen for it.
I have had my friends do this same test, with me listening for the click, and I could not hear it either. So, its not a case where everyone I know has worse hearing than I do. :rotf: :surrender: :thumbsup: :thumbsup: