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Old March 6, 2011, 08:36 AM   #1
steve1147
Senior Member
 
Join Date: December 5, 2009
Location: Valles Mines, Missouri
Posts: 140
Brinnell hardness discrepancies?

Hello All,
With my recent accumulation of unknown lead and alloys I finally bought a Lee hardness tester.
Now, unless I'm doing something wrong, and I've repeated this several times, when I test the one pound ingots of smelted wheel weights, I get a reading of .050 (bhn: 20.9), but when I test the bullets recently cast from these same ingots (230 gn 45acp), I get a .055 (bhn: 17.2). Am I missing something here, does the smaller bullet just allow more expansion of the indent or did someone sneak some pure lead into my pot before the last casting???
Thanks! Steve W.

PS to above: While either of these looks fine and work fine for my .38 and .45acp's, I'm getting ready to start casting for my 40 s&w and it looks like I'll need to harden this up for it's high pressures. I've got 5# each of antimony(pre-alloyed with lead) and tin coming from Rotometals. Any experience of getting ww's up to proper hardness for .40 cal?
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Last edited by steve1147; March 6, 2011 at 08:50 AM.
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