Answer: There is an old rifleman's trick, wherein you hold the bolt with thumb and forefinger, and pull the trigger with your little finger. During WW1, at Belleau Wood, where Marines, in a wheat field, kept up such a high rate of fire that the Germans thought they had machine guns. It is simply a matter of practice, dry firing, until you develop muscle memory.
Saw an Old Corps sergeant demonstrate it at the range. He kept them all on the paper, at 100 yards, with an '03 Springfield. You don't have to take your hand off the bolt, and re-acquire your target.
It seems, sometimes, that these "experts" are out to create doubt.
As you are creating doubt.
Lets go back to the bullet hole in the windshied.
Its clearly shown in the pictures of the car at the dallas hospital.
Is this a “ magic bullet “ too. Pun intended