I took a 125 grain 4 blade head, and cut off two of the blades leaving just enough to make a spur on those two sides. That way, the other two blades do the cutting damage, and the spurs keep the arrow from passing all the way thru. The turkey won' t be able to fly that way, or if he does, not very far. I normally shoot, and have my bow tuned for 100 grain heads. By using a 125 grain head and cutting the blades that way, it' s about 101 grains.