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Old November 16, 2012, 04:01 PM   #4
Senior Member
Join Date: August 25, 2008
Location: 1B ID
Posts: 10,393
First step with a new Lee mold: check alignment and deburr.
Second step: face the top of the mated blocks and the sprue plate with emery cloth on a piece of glass.

Third: cast with it, so you can figure out what else is wrong.

I haven't lapped one yet, but I do have a mold that would probably benefit from it.
"Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."
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