Kephart on Snap Shooting

Another excerpt from Horace Kephart's Camping and Woodcraft:

Although one may often get a chance for a standing shot, yet I think it is best to spend most of one's target ammunition (at home) in snap-shooting. By snap-shooting with the rifle I do not mean merely glancing along a barrel and disregarding the sights. You must see your bead, and, in the case of open sights, you must see that the bead is well down in the notch; but it is snap-shooting to press the trigger instantly when it first touches, or rather when it swings close to, the object that you want to hit, instead of waiting to swing back and steady down, as one would do when aiming deliberately. To snap-shoot at the right instant, without pulling off to one side, is a fine art.