I'll put in my two cents, I have shot one turkey with a 3-blade snuffer and did not get full penetration. I have shot 4 deer with a 2 blade single-bevel ultra sharp Tuffhead, weighing 225 grains. See the "Me, my Whip and dem deers" thread on the 2012 highlights forum for pics about the penetration. Unbelievable but pictures prove it. I have used the NAP thunderhead with a compound but was disappointed with the blood trails so I switched to the Montec because it has a cut on contact tip which is an advantage that I think is necessary with trad gear. Minimize the resistance to the broadhead any way you can. I personally will never use a replaceable blade head because of damage to the head that might occur on heavy bone hits if the shot doesn't hit exactly where you want it to. Use the most durable broadhead you can find, cut on contact and deadly sharp. The Tuffhead saved me on a few hits that contacted heavy bone but still killed the deer within 80 yards. That's my experience and my opinion. Dr. Ed. Ashby has done lots of broadhead testing, read some of the information available and decide which way to go.