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Old February 11, 2013, 10:08 AM   #4
musher
Senior Member
 
Join Date: April 23, 2005
Posts: 416
The pink cases have lost some of the alloying zinc in the brass and are indeed weaker.

Zinc is sacrificial to just about everything in galvanic corrosion. Pretty easy to imagine losing zinc in a case laying about on the ground.
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