Buzz,

You are correct that a clenched jaw tightens the massetter muscle and moves the jaw outward. I should have use a closed or open jaw in my first post. A closed jaw does not necessarily tighten the massetter muscle but with my gun does change my mounting position.

When I throw a gun up, swing and shoot I never get face slap. With the same gun a premount will give me a welt. I am looking at all aspects of my premount position.

Last edited by Tamid; 06/18/18 05:35 PM.
Nothing is foolproof to a sufficiently talented fool.