[rickyrick]

There are very few if not any instant kills from a rifle aside from scrambling the brain. Heart lung shots are certainly not instant. The animal may fall in place and by the time you travel 300 yards to the animal, it's probably dead by then.

For some strange reason coyotes die very quickly, most other animals there is some period of time before death completes. The animal may very well be unconscious during most of the process.