I have used them for the past 2 seasons and I can say they are very deadly. They make massive blood trails. My only complaint would be that the mechanical blades are a bit fragile, they are usually done after the 1st pass through, but then again it could be caused by them burying 12" into the rocky soil that we have around here. I shot a turkey with one last year at 35 yards after shooting the sam ebroadhead through a doe about 30 minutes earlier and it blew through that turkey so fast and kept going and I never found the arrow. The doe made it about 30 yards and the turkey about 10 before piling up.