One of my new creations.
Les Baer 1911
Les Baer 1911
When you squeeze the trigger you hear the action go "clink clink" then the brass hit the dirt and finally the bullet impact.
I would say it is pretty quiet.
They don't sit on the shelf for long.
As long as you are shooting less then 1100 fps more or less you are subsonic.
My wifes godfather makes subsonic loads for me, I am not sure as far as the specks of his loads.