This ingenious Lead Hardness Tester quickly determines the Brinell hardness of any lead allow, known or unknown. Test the hardness of your lead scrap. Create repeatable alloys. Record your results.
The handy ball indenter, with calibrated spring mounts to your reloading press. The V block cradle fits in place of the shell holder. Follow the easy instructions, and measure the impression, using the calibrated LEE pocket microscope.
The LEE Reloading Manual, and the chart included, explain how to express Brinell hardness as Yield Strength. LEE claims that the best accuracy is obtained when chamber pressure is 90% of alloy yield strength. We have always loaded harder or softer bullets to match milder or hotter loads, but we never understood the math before!