I killed 2 bucks last year using 100 gr. wasp jak-hammers for the first time. The first was a double lung pass through and it ran hard for about 70 yards and left a blood trail that a blind man could follow. The second was at a steep angle and took out 1 lung and the heart . It wasn't a complete pass through but did break the skin in the center of it's breast bone. It went only 40 yards and the blood trail wasn't as heavy but when I dressed it out it's chest cavity was full of blood. After seeing the 1 3/4 inch 3 blade cut through the heart I was amazed that it went as far as it did.