Callaway xr 16 pro driver the xr 16 pro driver is built with the best in aerodynamics a deeper face and a redesigned speed step for better players this driver has the forgiveness that better players can use to their advantage and thatrsquos what happens when you add moi stretch out the crown with a bigger footprint and put in a center of gravity thatrsquos lower and deeper all this forgiveness leads to more ball speed at every impact location which can add more distance for all golfer