Another thing I've noticed, is that with wide cast bullets........the is greater damage up front where the impact occurs (like a punch from Mike Tyson) and less damage as the bullet travels through and out the body.

In difference, an expanding bullet causes increasing damage as it penetrates (and expands). Being as it's frontal diameter increases and the "shock" wave increases.

Basically, I'm seeing more damage on impact with case and greater damage on exit with expanding.

From my limited experience, of course.