Blood trails and how long an animal goes after the hit is more the result of shot placement. I have limited experience with two blade heads, but from the 3 deer I have shot with them I found the blood trails to be a little less than those of a typical 3 blade head. They were still good though. Recovery time was a little longer as well, and the animals seem to have made it a little farther. They were all just as dead though. Overall though quality two blade heads are excellent, penetration is improved and you need to keep in mind they have been killing deer a lot longer than we have been around! When you wiegh the pro' s and con' s I think in the field the differnce is small, try them out and see. If you do your part they will do theirs.