I do, this stops the heart from beating however so does 180 grains of lead to the heart. Brain death happens after the same period of time in either case due to oxygen/blood deprivation. The bullet does not send high voltage to the brain causing instant death, the entire body behind the bullet strike is paralyzed.
A recent study I read that was performed on a deer farm that tested positive for CWD had interesting results. They took the opportunity to try and find out why sometimes a heart shot deer will fold without a twitch and other times they can run 100 yards. Upon dissection of the deer that dropped instantly they found all the blood vessels in the brain had exploded. The conclusion was that the bullet struck just as the heart valves opened sending a high pressure rush of blood to the brain blowing up the capillaries. This is the only time brain death will be near immediate when utilizing a body shot.
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