And about shock, I haven't said that shock kills. But the shock created when the bullet hits a body organ, or the area around the entry and exit wounds, violently shakes those areas. This leaves behind bloodshot flesh. The shock may not kill a large animal, but it sometimes stops the lungs from inhaling or exhaling, and even makes an animal shot near the brain pass-out for a moment, which then gets up and runs.
Be careful. Laymen use all kinds of made-up words in discussions of terminal ballistics/terminal effects. These include the infamous "hydrostatic shock", a nonsense term with no scientific validity. "Shock" has a very specific definition in trauma medicine and in wound ballistics. "Shock" isn't impact energy, and it isn't the physical force of the bullet striking flesh, or the formation of a temporary cavity, or any of these ideas. "Shock" is a physiological state of decreased tissue perfusion, which in turn is due to decreased blood pressure, blood volume, etc. Period.
Shock is the state wherein the recipient of the injury doesn't have enough blood flowing into its vital organs (especially the CNS) functioning. Shock can be cause by stopping the heart (cardiogenic shock), draining the blood out of the system (hemorrhagic shock), damage to the thoracic spinal cord (spinal shock), and neural reflex (neurogenic shock). There are a few other categories, but this simplification handles the bulk of it. As you have probably surmised by now, the primary cause of death for most game animals is hemorrhagic shock, secondary to penetrating thoracic trauma.
Tissue damage done by direct bullet impact results in a permanent wound cavity, which is literally the hole drilled in the body by the bullet, which is a permanent injury. Tissue damage done by transmission of kinetic energy into the tissues in a wave form results in a temporary wound cavity, which is what causes "bloodshot" meat, etc., but this does not result in permanent injury. What you are describing in your post is physical transfer of kinetic energy to the body, not "shock".
