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Thread: Checking calibration of Lee hardness tester

  1. #1
    Boolit Buddy
    Join Date
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    Checking calibration of Lee hardness tester

    It's there a readily available alloy I can use to check the calibration (or my ability to accurately measure with) of the Lee hardness tester? I have dead soft lead but the microscope scale only goes to .0100 and the reading is pass that. Is all 95% tin solder the same as far as hardness is concerned? I have some of that I could smelt a sample.

  2. #2
    Boolit Master
    JBinMN's Avatar
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    If no one gives you an answer here, I think your question would be a good one to ask the folks at Lee Precision. Please share it here if that is what you end up doing.


    I think the compression amount is 60 pounds when the "post" is held flush with the top of the testing die, but how to check it for accuracy( calibrate?), I do not know.

    Interesting & good question. Hopefully someone here knows, or has asked at Lee & will tell about it.


    BTW, I do not use the microscope but instead use a calipers. I color in the dimple with, usually a red sharpie pen & then use the calipers to measure the dimple diameter. Perhaps using that method & comparing to the chart might help.
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  3. #3
    Boolit Master
    JBinMN's Avatar
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    I got this from Conditor22/Gramps, but it is an "extended BHN chart to use with the Lee tester:



    It goes from .040 or 33 BHN to .108 diameter or 4.0 BHN
    2nd Amend./U.S. Const. - "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."

    ~~ WWG1WGA ~~

    Restore the Republic!!!

    For the Fudds > "Those who appease a tiger, do so in the hope that the tiger will eat them last." -Winston Churchill.

    President Reagan tells it like it is: https://www.youtube.com/watch?v=c6MwPgPK7WQ

    Phil Robertson explains the Wall: https://youtu.be/f9d1Wof7S4o

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check