A rounding device and method of rounding that provides improved rounding of semi-solid material portions by introducing variations in the contours and profile of the working surface of a rounding bar to produce one or more substantial changes in the axis of rotation of the semi-solid material portion along the length of the rounding bar's working surface. By controlling the changes in the axis of rotation the rounded material can be produced with more uniformity, fewer blemishes and less surfaces that are left un-worked, as compared to rounding devices that are currently in use.