In my test garden(gb around 55) i have a .58 cal 3 ringer buried at 9 inches. In BP 2TF sensitivity at 95 i have to sweep over it 10-15 times just to get a small "chirp" and t.he VD.I stays at 12-13. I can go to all metal and i do hear it but the VDI stays aroun 12-13 and jumps to around 90 maybe once every 20 sweeps over it. Is this normal? I hear of guys digging minies at 10-12" but in disc id never even hear a minie in the ground and in AM itd read iron. Thanks in advance