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243winxb · February 11, 2013, 11:48 AM

The black cases have come in contact with ammonia that forms in nature. This make brass brittle & unsafe. Google "stress corrosion cracking" or "Season Cracking"

February 11, 2013, 11:48 AM	#8
243winxb Senior Member Join Date: July 26, 2011 Posts: 598	The black cases have come in contact with ammonia that forms in nature. This make brass brittle & unsafe. Google "stress corrosion cracking" or "Season Cracking"