Baffling question, baffling responces...
I know I certainly haven't a clue about the components a builder uses to decide between iron or lead, BUT...there's a fleet of Beneteau First 42's in Chicago that race 'One Design' with the LK version tagged with a PHRF of 93 and the IK model enjoying a PHRF of 96. 'LK' = lead keel & 'IK' = iron keel. Same manufacturer, same boat, two different keel materials, 2 PHRF ratings and both racing within a 'One Design' fleet. Go figure.Not sure if this helps or muddies the water, but remember, I began by saying I haven't a clue. I know my little h28.5 was always been built with an iron keel and every season I have to deal with the 'smile' @ the keel to hull joint. Not a problem, just something that's dealt w/ pre-splash every season.Carry on!