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Old March 30, 2011, 03:56 PM   #18
Rangefinder
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Join Date: August 4, 2005
Posts: 2,017
Quote:
BUT I'll have to revise what I posted last night. I just took that case I crushed so easily, cut it with a tin snips. It's clearly only a surface coating of copper. Then I stuck another copper colored one in a lee spinner, spun it holding some steel wool against it. The copper came right off, it's a very thin film. No matter though, some of the zinc is gone, therefore some of the strength is also gone, so in the recycle bag it goes.
OK, that's more consistent with what I expected you'd find. All things considered, you'd loose the same amount of outer layer by tumbling off oxidation from a case. I would seriously consider not junking these cases just yet. With such a minute amount of removal from brand-new brass, there shouldn't be any issue at all with weakening.
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