Little bit of work but I got it done.
I used a coleman stove that runs off of the coleman fuel and an Oneida baking pan from walmart. Pan dimensions on the sticker were 10 in. x 5 in. Of course the pan wasn't square.
I got the lead in half pound blocks. I used my digital bathroom scale to weigh the stuff out. Originally, I planned on making a 25 lb brick. When I got to 25 lbs. I decided to go to 50. I was one block shy of making what I thought was 50 lbs and this was because the lead was about to spill out of the pan! Hell, after it cooled off it weighed in at 49.8 lbs. Im happy!
Here is a helpful formula for you do it yourselfers...."good", "fairly pure" lead is about .41 lbs. per cubic inch. For example, a 10 in. x 10 in. x 1 in. plate = 100 cubic inches. .41 * 100 cu. inches = 41 lbs. So a 10x10x1 plate should come out close to about 41 lbs.
I used a big pair of channel locks to drop in the 1/2 lb. blocks of lead into the pan so that it wouldn't splash. I could do about three to four at a time once i got the bottom of the pan coated with molten lead.
As a finishing touch, I wrapped it in a lil bit of left over marine grade black carpet that I had laying around so that it would look pretty.
And yes, I did this outside and used a pair of heavy duty welding gloves!