@Flyblown, great post.
Matt Grant in his Sharpshooter book explains that if you shoot the heart, you cause blood everywhere to stop flowing -- yet this stagnant blood still contains much oxygen etc. and the animal can run quite far on this alone (150m in your diagram) before it drops somewhere inaccessible.
Shoot the lung/hilum however, and the pumping heart aids bleeding out. It quickly pumps the circulation free of blood, which is lost into airways and chest cavity through the wound channel, and unconsciousness then death follows quickly.
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