For years I taught trigger reset drills to other LEO's, thinking this was a useful technique. Several years ago, however the FBI did some real, bona fide scientific research on trigger pull with their problem shooters using a computer based graphic interface which graphed the trigger motion. The idea was to show the shooters how to pull the trigger with a feedback mechanism - it worked pretty well. To determine a baseline of how the trigger should be pulled, they got some of the competition biggies, I know Rob Leatham was one, to shoot on the machine. One of the things they found out was that even the experts return to full extension of the trigger finger during rapid fire. No one used the reset.
Not that you might not want to do it for pure target work, but it is a waste of time for defensive shooting. Kind of embarrassing for those of us who taught that drill for years.
