If its too big to fit into a dutch oven you can melt chunks of it into the dutch oven with a handheld torch.
All of your casting questions can be answered at the premier cast boolit board. But be careful! Casting is addictive and these guys will sure lighten your wallet with suggestions.
http://www.castboolits.gunloads.com/...earchid=256290
There's prolly about 10,000 years of combined experiance on that board.