The first shot isn't comparable to the second two. Assuming the first shot hit point of aim as I didn't see impact, whereas the second two are very obvious impact location.
First one, shot angle means the major blood vessels in front of the heart were damaged, immediate lost of blood pressure to brain = immediate loss of consciousness.
The other two were lung shots, blood pressure is maintained until the deer dies from hypovolemic shock (blood volume loss causing blood pressure loss and thereafter loss of consciousness).
Calibre or cartridge isn't a meaningful variable here that I can see, different mechanism of injury/death.
I always do a bit of a poke around after killing something, can normally pin point exactly what was the cause of death and shot placement with adequately designed bullet over calibre or cartridge any day in my opinion. I'm not terribly convinced large calibres give wider margins of error or any of that guff either.
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