triplehooked
Member
Well you will have to excuse my semi-pun attempt, but my questions/comments are regarding hunting in nails with the F75 ....
I've noticed thus far with this detector that a deeper and/or older shallow nail will sometimes hit as a coin. At times the vdi will even remain fairly stable, but only IF you don't rotate around the target. That being said, as soon as you move at all, the vdi will jump all over and iron grunt will kick in (disc. set at 4-6, sens. high as possible, BP mode, running either 2f or 4h tones) . I have dug at least 20 nails (mostly square) of various sizes and at various depths to confirm this. I will say that all of the nails dug were in a moderate stage of decay, ie. with halo/rust colored soil around the nail itself. My concern is that if I start ignoring these signals I will be passing partially iron masked coins. What are your folks' experience, am I assuming correctly? I know with the CZ series, the best way to avoid digging the deep nails was to listen for that iron grunt or break at the end of the target sweep. As Bartles and James would say, " Thank you for your support." 
