jturkey, Cane and bamboo are hollow. When we're talking about filling the cane , we're talking about filling that hollow with a piece of dowel. I suppose using a heavy dowel would add some weight, but that's not why I do it. When I taper a cane for mounting a commercial point, the taper is always shortened by the empty center. Filling the cane before tapering gives a little more glue surface and lessens that chances that the cane will be driven deeper into the socket and collapse. Of course you might just plan on never hitting wood or stones, etc. and then the extra strength isn't needed. Ron