The children of bygone days cast lead toy soldiers, therefore as a 21st century adult you should be able to master casting ball.
Running ball is not rocket science so do not let the process intimidate you. Do not worry about fluxing, scraping, stiring, adding this-or-that and being at a certain number of degrees tempature for "perfect" balls made from "perfect" lead. Only people that do not shoot too much can be that concerned with perfection, weighing every ball and developing the perfect casting ritual.
Lead too cold will give wrinkled balls or bullets. Throw them back in the pot.
Too hot will have a frosted appearance, but be smooth and usable. Do not throw them back, they are not ruined, just frosted.
Perfect temp will be bright and shiney without wrinkles or frosted appearance.
What the thermostat on your pot says is irrivelant, you look for the finished product and adjust up or down on the dial to get the "perfect temp".
Same with running ball over the fire. You have to have a good bed of coals. Good for demos, though dangerous for visitors (they like to snatch and grab), but better balls will be produced using the uniform temp of your electric pot.
I prefer the Lee production pot. Mine is 30 years old(?). During the 80s I was shooting competitive combat pistol and casting 1000 rounds a week from '84-'88. You do the math. The pot is still casting ball.
I started out using a Coleman stove and cast iron skillet with an old tablespoon stuck in a wooden handle as a dipper. It made bullets that were just as good as the fancy gear I now use.
For round ball the Lee blocks are as good as any and half the price of most. I own Seco, Lyman, RCBS, Hinsley and Gibbs, Rapine, Dixie blocks and two origionals, but cast more from my Lee RB molds than all of the others combined.
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