Groundhunter...regarding the mech heads. I will agree with most of the others that said the head did not fail. My opinion is it only did the best it could given the circumstances. There are some good mech's out there and alot of folks have mcuh success with them. But I'm like david, I really don't care for them. Personally I prefer a strong cut on contact head for that exact reason. If I make a "not so great" shot, I have a better chance of turning it into a killing shot. I shoot Magnus 2 blade heads, and have had some wicked penetration with them, even in heavy bone. I'm not saying they are the greatest and everyone should use them, but I've been very pleased with my results. Obviously shot placement is the key regardless of head type. Tune your setup, and shoot what you are confident in.