a real good turkey broadhead is the rocket hammerhead. These blades are huge with a 2 inch cutting diameter. On this one video, you watch a kid take a turkey with a crossbow. he hits it low but with 2 inches of cutting diameter it drops in like 40-50 yards. i have a pack of them and i want to use them on deer but i am afraid to because i am not sure i will get the deep enough penetration shooting only 70 and using carbon arrows. But for turkey, they have the knock down power. good luck!