I used to make shot with an old lee lead ,elted that the thermostst burned out in. drilled a hole in the bottom of it and tapped it for 1/4" npt screwed in a brass needle valve and and added a cap with an .040 hole drilled in it. took it up on the roof over the eve and when the lead melted I opened the valve and let the lead drip out and into an old blueing tank filled with water because my roof wasn't high enough to cool it enough to drop it into sand. my buddies called it chilled shot. I used pure lead for soft shot and wheel weights for magnum shot worked pretty good, made a mix of #6 and #7.5. I didn't screen it, but I guess I could have. when it was empty I closed the valve with needlenosed pliers and melted another 4 lbs. I hunt geese now and have to shoot bismuth shot which is harder than magnum and my barrel still seems fine, but at $60 a pound shooting is kept to a minimum. I am looking into "nice shot" another "non toxic" alternative to steel thats only $40 a pound.