Ken Davies, in "The Better Shot", recommends gripping the wrist with the shooting hand using all four fingers - the index (trigger) finger included of course...
Then, extend the trigger finger along the trigger guard. According to Ken, the trigger finger will meet the front trigger just 'at the base of the pad in front of the first joint'. The spacing at the rear of the guard thus obtained keeps the middle finger from being bruised by the trigger guard.
Now, take this just a bit further... at the shot... when the trigger is crushed and the trigger moves - it ends up in the first finger joint.
It follows that to pull the second trigger, one must insert more of the finger into the guard (unless the grip is shifted). Articulated triggers were made for just this problem.
The gun and hands should move and recoil as a unit. The hips guide the gun, not the hands.
