Slightly low depending on distance... If I aim lower chest I get heart. If he flinches I get lung. Win win for me although I have never shot a deer over 30 yards and that was a ranged fluke. Last season I could have spit on one and the others were under 20yds. Frankly,, I think I can aim where I want to hit them under 20yds with zippo on the problem scale.
As far as the sound of the shot being taken it's surprizing. Basically I "think" the bolt is no more than a foot or two from the rail when the sound reaches the deer...