Depends on your poundage mostly I'd say. If your shooting on the low side I'd definitely stick with 2 blade heads. If your pulling back some decent weight a 3 blade head will do you just fine. I've been using 3 blade snuffers for 14 years and I've never had an issue with bad penetration. Either head (2 or 3 blade) will get the job done as long as your set up permits It.