Here’s an esoteric one....
Bullet weight in grains times bullet diameter times muzzle velocity divided by 7000. This gives John “Pondoro” Taylor’s “Knock Out Value” as he called it.
I pretty much favor a saying by a friend of mine, “Shot placement is King, adequate penetration is Queen, and all else is angels dancing on the head of a pin.”
“Here’s an esoteric one....
Bullet weight in grains times bullet diameter times muzzle velocity divided by 7000. This gives John “Pondoro” Taylor’s “Knock Out Value” as he called it...” [Tijeras_Slim, post 58]
Just because your momentum equation is easy to calculate doesn’t mean it captures reality.
No one has succeeded in fully explaining everything that happens when a projectile hits a living entity. My guess is no one ever will: biological critters (human, animal, plant) vary too much.
Your equation can be of use in comparing the relative merit of one projectile to another. But the key word is “relative.”
John “Pondoro” Taylor amassed a lot of field experience, but he wasn’t able to collect the quantity & variety of data that has been gathered by the weapons development sections of the military establishment. No individual could do so.