There are just so many things that can happen that cause no blood reguardless of a perfectly placed shot, and we just cant explain why.....I've had it happen more than once, all deer were found some went over 100yds with heart shots and complete pass throughs with No Blood, others dropped on the spot, some ran 30 yds. All with entrance and exit holes that you'd swear there's no way there could be no blood. Other's bled a 3 foot blood trail with the exact same placed shot.
(BP)