Shot a doe 2 years ago at about 25 yds with a 150gr. 308. I hit a little high taking out the upper part of the lungs and breaking the spine. The deer stumbled and simply fell over. I would say that the temporary wound cavity caused by velocity must have broken the spine as the entrance wound was a few inches away from the spine proper. Possibly the shockwave can disrupt the spinal column enough to incapacitate the deer??
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