Quote:
Originally Posted by KeystoneWeaponBK
Here is the Taylor KO Factor, interesting stuff...
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Bullet diameter is not factored in at all in kinetic energy (foot pounds). But we know that the larger the hole, the faster the blood loss. Kinetic energy is what causes deformation however, which is why the high velocity rounds dimple the plates while the 45s don't. The energy is dissipated over a smaller area for the small diameter bullet resulting in a higher energy dissipation per square inch leading to more deformation.
Or in layman terms, a high velocity small diameter bullet is like hitting the plate with a pick axe, while a low velocity large diameter bullet is like hitting the place with a sledge hammer. The pick axe will make a deeper dent.