Lundy,

If you can get hold of a copy, there is some very good stuff about this in Alexander Yur'Yev's book 'Competitive Shooting'.

There is a 'fully down' wrist/hand position, and an 'equilibrium' wrist/hand position - it is the equilibrium position that is used.

They used electro-mylogram's to find what position gave the least muscle activity.

Please try it - hold arm out with wrist straight, then drop wrist into comfortable position (equilibrium) - it will go there almost 'automatically'.

You can then drop the wrist slightly further down ('fully down'), but you will consciously have to do this.

Have fun & a good Sunday

Best regards

Russ