The jury is definately out on which is better single point cut or button. But both are superior to hammer forge (your CVA's, traditions, etc and most factory centerfiresexcept savage)in my opinion.

Dan Lilja, hart, douglas, will all say button rifleing makes for a smoother straigter rifling. Krieger will tell you button rifling causes stresses on the barrel. But my last Krieger, I wasn't happy with.