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Old February 8, 2013, 03:31 PM   #9
F. Guffey
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Join Date: July 18, 2008
Posts: 2,330
Just a guess, someone drilled out a stuck case and went too far, in the old days there was a chisel called 'cape'. As long as the parent metal was straight and smooth, no problem, BUT! when there was a reduction in the diameter the cape chisel dug in.

F. Guffey
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