The last dozen or so deer that I have killed were with single bevel hills. Cut from unhoned and heat tempered Hill blanks. The last three deer my son shot were with 140s, one was sharpened according to the Hill instructions and the others were sharpened with a coarse and fine diamond hone. I get mine razor sharp and then put a very fine serration on them with a Grizzly file. I do the same thing with Grizzlies, I have not seen if they are better than Grizzlies or not, but we have not lost a deer with either one.