Yeah, they're definitely lethal. The blood trail it left was the widest and shortest I've had. They're also the sharpest broadhead I've seen right out of the box, and I was using NAP Thunderheads and Nitrons before. They are pretty small in diameter though. That's why I've just got a half-dozen of American Broadhead's new Liberty heads. They're 1-3/16" diameter with the same design as the Sonics. I can't wait to try them out this fall.