View Single Post
Old February 11, 2013, 10:48 AM   #8
Senior Member
Join Date: July 26, 2011
Posts: 1,317
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"
243winxb is offline  
Page generated in 0.08136 seconds with 7 queries