I have a R2 and am detecting an 1873 home and have found horse shoes and nails among other things. The horseshoe nails show up at 96 VDI, yes the numbers vary, but 96 is predominate, especially as I wiggle the coil over the target. The detector is set at 2 tone, gain, 60, ID filter, 10, as well as notch filter. Iron audio, 3 tone break at 20, audio tone at 40. Secondly, Why doesn't each target give a steady tone? A nail is a nail, a pull tab is a pull tab, these numbers jump around as well. Yet, the R2 will ring out on coins, copper, silver etc, and of course, bottle tops. this is my first detector and have 40-50 hours with it.
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