Nothing hard and fast yet just a thought. Shot wasn't great but it was what I had at the time. Deer was nearly facing me, bullet entered just behind onside shoulder, took out back of one lung, destroyed liver, and made it into the stomach (which was really a sack of acorns). A tiny piece of the core made it into the off side ham, jacket was found in the stomach. I'm thinking a TTSX would have probably exited and gave a better blood trail, BT gave me a couple of drops of blood at initial location and nothing else until I found the deer. I of course applied the BT completely incorrectly (Pushing it had and hitting a close deer marginally) and it still killed the deer so I can't complain, but I would have liked more blood on the ground. Sample of one hasn't soured me on them yet though...