Ifletched six arrows. Three with 3 Blazers and three with 4 Blazers. I don't know about speed through my biscuit, but at twenty yards, the point of impact is the same. What was interesting though waschanging to my 100 gr 4-blade Muzzys. With 3 vanes, my arrows hit 3" to the right. With the 4 vanes,myMuzzys were hitting almost the same as my field tips. Jim