Do you have a source for this? My experience is a round that holds together tends to create a better wound channel.They're more likely to fragment and cause massive wounds.
Lighter faster bullet or the slower heavier bullets?
I like the lighter. They're more likely to fragment and cause massive wounds. My personal favorite is the Hornady 155gr XTP driven to at least 1200fps. I don't care about shooting through windshields and barriers - I'm not in the cop business. And I certainly don't care about pretty mushrooms either. I want dead meat....preferably hamburger...