I'm one of those who'd been taught and practiced heart/lung shots most of my life mainly due to being primarily a bowhunter.
When I moved out to the bush, I noticed the locals took mostly neck shots on just about everything and took a dim veiw of white folk wasting too much meat on heart/lung shots. Besides moose and caribou heart is too tasty to be sending lead through it.
Nowadays I shoot for the neck or head as a first choice.........IF the conditions and range are such that I'm reasonably certain of getting a solid hit.
If the range is too far, the wind, the animal's orientation to me or any other factors come into play, I'll go for a heart/lung shot.
Herman Cain '12
Squished bugs on a windshield is proof the slow/heavy bullet theory works.