RE: Shoulder or Double lung
"Shot placement" infers a level of control over where the bullet impacts that does not exist under field conditions. It allows nothing for umpteen variables on where that bullet is going in defiance to what the hunter sees through his scope. You "aim" a bullet, you don't "place" it. Then you hope your breathing, the animal's motion, the rifle's recoil, the wind, tree branches, slope, perceived range, and everthing else was in control enough to let the bullet fly to your point of aim. I'll go to my grave disputing the term "shot placement". It ain't a valid hook to hang yer hat on, specially when there's so much at stake. I've seed enuff poor shot critters to know a shooting misnomer when I hear one.