Quote:
Faster + Smaller = shock and penetration if it holds together.
Slower and heavier = Shock, more destruction and less penetration.
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Actually, that is almost exactly backwards. Slow, heavy projectiles penetrate farther than light, fast ones. A semi hitting a house at 30 mph (to use the example posted) would be down the road a ways before it could be stopped. A pickup at 60 mph will stop inside the house.
Which is better? The fast/light bullet delivers all its kinetic energy and kills the animal. The slow/heavy bullet delivers part of its kinetic and kills the animal. Either way, it's dinner time.