Thanks for everyone's input. The reason that I'm looking for a clear blood trail is that where I hunt, there's a ton of thick low brush with lots of thorns. Deer can disappear quickly once they head down a game trail, even if you know where they entered the brush. No blood trail makes it difficult to find the deer.
The bullets are definitely doing their job, I just need a trail.
The bullets are definitely doing their job, I just need a trail.