I hope they work for ya. I agree, targets, towels, etc don't simulate a deer's hide. However, if I am going to trust a mech head, it better open 100% of the time, no matter what I hit. The Snypers and Tekans opened 100% of the time on the same target. I just can't have faith in a head that I can't see working, and having faith in my equipment is very important to me. After seeing how they performed for me, I lost faith in them. I was dying for them to be THE head, and felt let down. Mine literally opened once out of a dozen shots. I am not about to go shoot my hunting heads into a brick, steel drum, or wood block, but it should at least perform as advertised, and mine did not. On the video they are shown being shot into a foam of some sort. My blades were jammed together so hard after the first shot I had to work with them to get them apart. The whole point of using these heads is for an entry hole. Mine failed to demonstrate the ability to create that, and I want way more than 5/8ths" cut. That is the other reason for using a mech head, the big cutting diameter. If I was not searching for the huge cutting power, I would go with a fixed blade head and be guaranteed a full sized entry hole. PM the results cause I will be very interested in how they do. At this point I just can't trust em.