Common mistake, but lawn bowling is very different than bocce. Bocce balls are uniform spheres that you can either roll or lob. They travel in a straight line. Lawn bowling balls are oblate spheroids that are weighted on one side so that they will always curve in a certain direction (more for light throws, so you can draw around a guard like in curling). They are always rolled. So it really is a lot more like curling than bocce, though granted there is nothing analogous to sweeping.