Your comparison is severely flawed in that the same amount of force/energy(1lb) is applied to both nails.When comparing the .22 cal bullet to a .308" bullet,the 22 has much less force/energy due to it's much lighter weight.
The .308" bullet also expands to a much larger diameter,creating a much larger,more effective wound.The extra velocity can help expansion ,but the smaller bullet can only expand so far before it comes apart.
That's actually the whole point of the comparison (the same force applied to two objects of different surface areas produces greater penetration in the smaller one). I was speaking only about the potential to penetrate at this point, because I believe it was you that was doubting the ability of the small bullet to penetrate as well as the larger one--- not what happens once the bullet enters the animal. The increased velocity of the smaller bullet does boost the already better penetrating ability of the smaller bullet too. I think your theory that the smaller bullets will ricochet or explode on impact only apply to hollow points, as the soft points will penetrate bone just fine... just ask the two badgers in my avatar how their heads felt. I put one shot in each of their ears at about 75 yards (yes I know badgers aren't deer, but they do have thick skulls
No question a 165 gr bullet will leave a much more devastating wound than a 63 grain one will. The difference is that the small bullet can be placed much more easily, so not nearly as much devastation is needed to kill outright.
As to your point that the smaller bullet will fragment once it enters the animal... isn't that exactly what we want to happen? A bullet that penetrates and explodes inside the head or chest cavity is the perfect wound as the entire energy is released into the vitals, creating lots of hydrostatic pressure and likely instant death.
The bottom line for me, is that a different set of rules need to apply to using the .22 on big game, but it's definitely up to the task.




















































