Shoulder rotation

Question
I focus on "turning my back square to the target" and keeping the from shoulder under the chin for clearance.

Sometimes I over-rotate so that my back is facing a bit right of the target.

My question is that is it a mistake to over-rotate the shoulders on the backswing?

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On my backswing my left shoulder/arm socket rotates under and past my chin. At this point my left shoulder winds up online with my left foot at the top of my swing. Its not stressful at all but I wonder if I am over active with my backswing.

Whats the farthest right I should rotate the lead shoulder?
What trick would you recommend to achieve muscle memory towards this?

Thanks.  

Answer
Hi Daren:

I would forget about your shoulders and concentrate more on sensing the golf club in your hands.  The swinging of the hands, the arms and the club should turn your shoulders.  You concentrate and focus on turning the shoulders, not swinging the club.  I think it hurts you to over rotate the shoulders simply because it's bad balance.  Then the alignment is thrown off and the swing shape takes on those elements.  Awful hard to time.  Your left shoulder should turn under your chin.  Leave it at that.  Your shoulders would be fully turned when at a 90 degree angle to the target line.  I would begin to see if you can feel the clubhead more or sense the clubhead more by concentrating on swinging the arms, hands and club to the top of the backswing in one motion.  You will have no trouble turning your shoulders it sounds like, but if you over rotate, it really messes with alignment and swing path.  No need to add potential problems if we don't need to.  Continued success.  

Eddie Kilthau
PGA Professional