it adds(wound out) and lessens (wound in) the amount of air stored in the dump chamber. if it is would all the way out you get a slightly quieter shot but if you wind in all the way in you get a bit better efficiency
Hey! You with the face! And the Nose! And the Mouth! And the Eyes! I KNOW YOU.
***The reason we help players that are new to the sport is so that they continue to play the sport***
Axes are best left to chopping wood.