This just further more states the point of shoot for the vitals, does it not? If you can't place a shot on a smaller target would it not make more sense under "field" conditions to aim for the larger - vital - target. Taking out the capacity to live by shooting the lungs will allow you more margin of error under these field conditions and put blood on the ground allowing you to collect your prize in short order. I am sorry but I have yet to see a elk live or go to far with both lungs deflated, so when I am shooting at an animal I will take the highest % shot to ensure a good, clean & ethical kill. I also think shot placement may be the wrong wording but I asimulate it to only taking those shots the will return the highest & odds of collecting your harvest...this can only be determined by ones experience, choice of bullet/caliber and abilities in the field.

I will add that I never felt the report of a gun under "field conditions", but if I can't accurately shoot a gun in practice then I don't feel it is good option for me personally to carry.