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<p>[QUOTE="Mac McDonald, post: 7623718, member: 117420"]About copper grades only being good for 10 years, et al...I never knew that...hadn't heard/read it or a reference to it...nothing...ever...until now. Seems like that would play into a lot of things with grades/grading, values, et al, not to be more openly factored.[/QUOTE]</p><p><br /></p>
[QUOTE="Mac McDonald, post: 7623718, member: 117420"]About copper grades only being good for 10 years, et al...I never knew that...hadn't heard/read it or a reference to it...nothing...ever...until now. Seems like that would play into a lot of things with grades/grading, values, et al, not to be more openly factored.[/QUOTE]
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