Spine consistency for Carbon Tech hunter series is pretty darn good, better than most all carbons. They shoot just as well as my ACCs, even with broadheads. I couldn't say the same for any other all carbons I have tried, but the Carbon Techs are very good, IME. Not sure about their construction, but they do not appear to be sanded to spec like others, one reason they are not all that smooth or quiet to draw through a whisker biscuit.