I've been using them pretty much exclusively for several seasons. I have never had one fail. Don't know how many deer I've killed with them, but all fell in sight and most were still razor sharp unless they wound up in the ground. Two seasons ago I killed a 600 pound cow moose with on. It went right thru the big "knuckle" that covers the heart (took a big chunk out of it), chipped off a piece of rib, centered the heart, ripped open the lungs and hit the off side shoulder. That broadhead was as good as new when I retrieved it and still sharp enough to hunt with. The moose took three steps and went down. I have never had a RC fail. They are easy to get scary sharp, stay sharp and you can vary the weight by changing ferrules. I even shot one into my poured concrete foundation when shooting them inside. It stuck in the foundation, and the tip got a little dinged up. I fixed that with a file and use that head for practice shooting. I have also hit two bear square in the shoulder without harming the heads....or the bears.