Went to melt some 100% lead today and the furnace only melted some of the shot I dropped in as a starter, when I added a ingot it harden [ cooled to semi solid] . I have it about a year and used it last fall,it a hour to melt 10lbs to start and 30 minutes for 5lbs after that. Lyman big dip . I have cast for about 5+ years and wore out a 60 year old Saeco my dad got in the late 50s or early 60's.