Its true even practice blades will kill a deer. The thing with dull blades is that they tend to tear through the deer instead of slice. A deer will leave better and more profuse blood trails from a very sharp broadhead, and the hole one clotup as easily.With a marginal hitthat may just nicka major artery a dull head would have a better chance of pushing the arteryout of the way instead of slicing it openlike arazor sharp one would do. Does every head come hair shaving sharp? No, but as hunters we should do every thing we can to up our chances of making the quickest cleanest kills possible and using a very sharp broadhead plays a majoy role in that.