I totally agree with you, though my point had nothing to do with whether or not a head shot is a good idea or a high percentage shot. The point is that a .22 rimfire has less kinetic energy than many a compound bow and far far less than even what would be considered a low powered deer rifle yet placed properly it can drop a deer as quickly as any "high powered" rifle.Does that mean it has knock down power? Either it does or putting a deer down quickly is much more a matter of what specific tissue is damaged than it is how much energy was expended to damage those vital parts.

Reb got my drift exactly.