Hi Raf,
Michael has written a very good piece about clodshots in this thread
http://www.vikingsword.com/vb/showth...light=clodshot
He believed, an so do i, that the lead was mostly used to shoot iron "balls" from Brass cannons without wearing them down to fast. The softer lead would ease the wear on the barrel walls. The corners on the iron core where made to closely resemble a ball shape. The lead was most could have been wraped around the iron core, but also cast.. this debate i still not finished.
Best