Nov 122012
 

Here are the US coins I have tested. These are air tests that are done after the target has been removed from the ground. I will be adding new items as they are found.

COINS (USA)

4k 8k 12k 18k
.01 cent 2012 Zinc 59 73 80 85
.01 cent 2000 Zinc 61 74 80 86
.01 cent 1980 Copper 73 83 88 91
.05 cent 2012 Nickel 37 46 55 64
.05 cent 1972 Nickel 37 46 55 64
.10 cent 2004 Copper 73 83 88 91
.10 cent 1942 Silver 76 85 89 92
.25 cent 2012 Copper 80 89 92 92
.25 cent 1967 Copper 83 89 92 95
.25 cent 1958 Silver 85 91 94 95

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