Quote:
Originally Posted by Mike Shepherd
...as someone pointed out there may be a galvanic corrosion problem if copper is used. Mike
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The joys of galvanic reactions. This is not gun related but one of those things that shows the truth of "Murphy's Law". The house we have was built in 1983. We purchased it in 1996. The basement became my "play" area. About 8 years ago, I was down there and thought I could hear water running when I knew nothing else was going on in the house that should make me think that. I started to investigate. I eventually found a covered sump hole and had a look inside. I could hear the water running there but not see it. The hole is only about 8" deep with a sand base. I moved a bit of sand and found the water supply line to the house was in there, as well as an outlet. I kept moving sand along the water line (copper) and encountered a 2" common nail with head resting against the line. I also saw water finally. I lifted the nail and suddenly had a lot of water spraying me and anything within ten feet. Dropped a bucket over the line, called the water utility, had the main shut off, cut the line and spliced in some new copper. Water back on and no problems since but that leak had been going on for years and created an underground mudhole. As that has dried out over the last 8 years, the cement floor has heaved and cracked and the teleposts (jackposts) have needed adjustment to re-level the whole house. All for the sake of a nail that ended up resting against the copper line.
Based on that, maybe copper shims for gun purposes would only see the shim needing replacement in a few decades. I'll leave that to the metalurgists to verify.
Cheers,
Jack