I have eased down the hammer in a revolver a few times, maybe ten thousand times, and never caused any grinding noise. The proper way is to hold the hammer with the thumb of the off hand, then pull the trigger and HOLD IT BACK while easing the hammer forward. Don't release the trigger until the hammer is down or you can harm the action (maybe even get a grinding noise?).
I know some folks think it is safer to put the finger or thumb between the hammer and the frame, and some manuals even say to do it that way, but I hate the sight of blood, expecially my own.
Jim
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