I have shot 3 bulls with G5 Montecs. One was straigh out of the package, unsharpened, and the bull only made it 60 yards. The other two I sharpeded the Montecs per the video and it made them noticably sharper, but they still don't feel like removable "razorblade" broadhead. Don't let that fool you, the one piece design will never feel the same due to blade thickness and sharpening angle. What I do is highlight the blades with a sharpie and sharpen the heads until the sharpie marks are gone and you have exposed new metal. If you want them crazy sharp, touch them up on some very fine sand paper after you have sharpened them with the stone. The two bulls I shot with the sharpened montecs died within sight also......great heads.