Attached is a picture of a very heavy bar of what feels like lead. It's marked "KIRK" and may be a keel weight for a boat. It's about 24" long by 4" x 4" and weighs...a lot.
I have heard of an alloy called Kirksite that's used in foundries to make tooling molds for drop hammers. It's zinc based. But this thing seems a lot heavier than zinc. I can't even lift it.
Any ideas if this would work for cast bullets and how I would analyze its composition? Should I cut off a piece and try melting it?
Thanks.