Question re Brinell Hardness Tester results

If I were spending cash on a commercial hardness tester I would sure consider the Cabin Tree offering. I built a tester fashioned after their design and like it, I don't have the actual "brinnel #" cross reference sheet that comes with the store-bought one but with "known" samples of different lead (pure, CWW, commercial hard cast etc.) , I can get repeatable readings easily.
 
fingers284 said:
If I were spending cash on a commercial hardness tester I would sure consider the Cabin Tree offering. I built a tester fashioned after their design and like it, I don't have the actual "brinnel #" cross reference sheet that comes with the store-bought one but with "known" samples of different lead (pure, CWW, commercial hard cast etc.) , I can get repeatable readings easily.
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This. I don't know what they cost now but a few years ago they were around $25 US without the dial indicator. Only another $15 to include a mounted indicator.

Very repeatable and close enough for casting bullets.
 
A further question for anyone who might know. If I file a flat spot onto a bullet, does the mechanical work I have performed filing, affect hardness? If it does, is it significant?
 
dodger59 said:
A further question for anyone who might know. If I file a flat spot onto a bullet, does the mechanical work I have performed filing, affect hardness? If it does, is it significant?
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Usually no, but if you water-dropped to make harder bullets the hardened surface layer is thin. If you file it off you won't get a true reading.​
 
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