Snuffy you forgot to mention that plumbers silver solder has antiomony. It is 95% tin 5% antimony. I used some to harden some soft lead from wheel weights. It worked ok. Melt temp went down to about 700 degrees, and fill out was good. I now have a steady supply of wheel weights from a friend so I use the clamp on. I save the soft lead for my cap and ball revolvers.
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No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.
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