Its getting close now...17 days till we leave for my Cape Buffalo hunt in South Africa! I have been getting everything dialed in and had some unexpected testing occur while tuning. Once I had everything dialed in I wanted to get my marks, well I got rushed and was shooting at 50 and went back to 20 and didn't reset my sight and shot high....real high. I had a cinder block sitting on top of the Morrell broadhead target because its so light to keep it from moving around. Not a controlled test at all and I know some will say a cinder block is soft but I think its a great example of momentum and what a heavy arrow is capable of. It broke the cinder block completely in too...... I can promise you your 400-450gr arrows would not fair as well. It also says a lot to not only the structural integrity of these broadheads but the twisting power of a single bevel head. The head penetrated up to the ferrule and I think this is a big reason that it broke the block. It was able to penetrate deep enough to get in and twist it apart. I can honestly say I thought the head and arrow was toast but in reality it was not. There was only the slightest bit of wobble after a spin test. Surely it was the head bent...but no it was the insert in the shaft that got tweaked a little. I put the head on another shaft and it spun true! In my eyes what makes it even more impressive is this isn't from an 80-90lb setup. Its a Halon 32 6 at 71lbs shooting a TAW of 965gr. Its making almost 90KE the MO is .92....The broadhead is a 200gr Massai Single bevel She packs a punch!!