both lungs!

Heart/Lung area (behind the shoulder)

i shoot for the heart/lung area trying to nick the shoulder. i like to try to take out some bone with a gun. with a bow its double lung.

Vitals right behind the front shoulder is where I aim everytime.

Allows for a bit of error but still a good, quick, clean kill.

Broadside is always the best shot to take, thought quartering away or quartering toward, can also be taken.