Does a ratio of , say, 30 lead to 1 tin refer to units of weight or volume? Given that tin is lighter than lead, if you weigh them, your alloy would contain a higher volume of tin than 1 in 30. if you wanted to get the volumes at 30:1, it might be easier to do it by water displacement. Would someone care to comment on this?I've always done it by water displacement meself. Thanks