I have a friend that says he is done with carbon and going back to alluminum. He is shooting .340 easton epics and says he is not geeting passthrus...ever. He has shot 4 deer this year recovered 2 and only had one passthru. I am thinking to myself that he probably is hitting the shoulder, but on one deer he swears he hit the ribcage...maybe even a little too far back. He thinks he hit a rib, exactly square and it didnt break. Not sure if I'm buying that. He pulls 70# and probably has 425 grins total arrow weight. Either way he said he always had passthrus with alluminum and is switching back...i tried to talk him into trying FMJ or Pile drivers but no dice. Just gets me thinking if anyone else has made the switch back?