I do business with an industrial supplier that carries lead shot in 9 sizes. Size #9 (.080") through .440". McMaster Carr Supply, New Brunswick NJ, 732-329-3200. Pricing is about $50 per 25 lb bag.
Almost forgot ... same supplier also has oxygen free copper balls, brass balls, aluminum bronze balls and various plastic / nylon balls. If you wanted to explore the world of foundry metals suppliers you could probably come up with many more options. Anyone who broke out in a sweat reading this is a tweaker in need of therapy & drugs.
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