All I can tell you is that I have used the 2 blade 125's on my recent pig hunt. Shot was through the lungs, and I recoverd him. I don't doubt what you think you saw, but any animal hit properly though the chest with any broadhead will go down reasonably fast. Two blade heads are lethal and I would tend to think that the hit's were not as good as you may think. I have found that 99% of the "broadhead failed" conversation I have had, more often than not it was the location of the hit, and not the broadhead.