My .357/.38 case expander from Redding (the premium expander, advertised for use with lead bullets) resulted in brass swaging my 0.3577” boolits down to 0.3570”. Redding technical service told me all is good. I told them lead should typically be 0.358” coming out of the brass, or larger. They replied: “If your targets are ok, it’s only a thou.”
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That’s a pretty strange response. My groups with a 9mm were cut in half when I switched from a 0.356” sizer to a 0.357” sizer. Just because it’s not leading and you hit the paper, doesn’t mean it’s right. I’d prefer it if my boolits came out of the brass at 0.358” (assume I get a larger sizing die).
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Seems like the tech support at Redding doesn’t know what he’s talking about. Am I looking at this wrong?