If you get a complete pass through there is no doubt a 3 blade bleeds more, the question is which penetrates better ? Would rather have a pass through with a 2 blade, than just stick it in with a 3 blade, especially a down ward shot, like from a treestand. I have killed way more whitetails with 2 blades, than 3 blades, but have had some pretty crappy blood trails with 2 blades. After over 20 years , im still undecided which is best, but I still tend to use 2 blades. Maybe just because they are easier to sharpen.