Smoothness brings a pleasant comfort to your draw. This helps when shooting many arrows by helping you maintain proper technique, as if you were using a lower poundage bow.
Smoothness is a characteristic of the limbs’ profile and their draw force curve (DFC) at your draw length. Less slope means more smoothness.
The S-Curve’s smoothness is equivalent to that of the Xcurve, as the increase in poundage during the last inch of your draw is only about 3.5%.
The Curve’s smoothness is similar to that of smooth laminate limbs, with a 5% increase in poundage during the last inch of the draw.
Limbs which show a 6% or more increase in poundage for the last inch of draw are usually not considered to be smooth limbs.