I don't worry about blood trails. I worry about well-placed shots, regardless of caliber, and I stay away from "hard" bullets, unless they are "hardcast". Blood trails, and the lack of them, have been interesting to observe, but they have never correlated with the rapidity of death of the animal in any way. Most of the animals that I've seen die within a handful of steps of being shot (non-CNS shots) have exhibited zero blood trail. Blood trails have been almost completely irrelevant to me. I know others have had different experiences.
