Finally got around to setting up and casting some for my old Argentine Rolling Block. I use very soft alloy, just lead and a little tin to help the alloy flow better for more complete fill in the big single cavity. Had to heat my furnace and drain my smokeless alloy and then melt a batch of more or less pure lead. Got to casting and got about 150 or so good boolits. Single cavity and waiting to make sure it cools enough to keep the mold from over heating makes for slow going. Lyman 439186, beautiful bullet, shoots good and is a lot of fun in the old rifle.