Hi j.t.
My deepest coin was a wheat at 7" using the 6"x10"coil mixed with lots of trash and when i say small coil i'm using the 4.5"x7" and 5" EXcelerator coils and hunting older iron infested sites where coins are laying on top or close to hotrocks and hot soil mixed with lots of trash and target masking is the biggest obstacle, not depth . Found an 1866 2 cent piece at less than 2" at a heavily hunted trashed site using the 5" coil and digging the tone variance. There's a phase of this hobby where uncovering masked targets is a major objective and overall depth is a mute point. I use the 6"x10" as my large coil but prefer using the M6 and smaller coils at trashy sites where i feel the M6 is outstanding. I have other detectors that i prefer for overall depth but the M6 is smoking hot at trashy sites due to it's recovery speed, tone id and coil selections. HH Bill
My deepest coin was a wheat at 7" using the 6"x10"coil mixed with lots of trash and when i say small coil i'm using the 4.5"x7" and 5" EXcelerator coils and hunting older iron infested sites where coins are laying on top or close to hotrocks and hot soil mixed with lots of trash and target masking is the biggest obstacle, not depth . Found an 1866 2 cent piece at less than 2" at a heavily hunted trashed site using the 5" coil and digging the tone variance. There's a phase of this hobby where uncovering masked targets is a major objective and overall depth is a mute point. I use the 6"x10" as my large coil but prefer using the M6 and smaller coils at trashy sites where i feel the M6 is outstanding. I have other detectors that i prefer for overall depth but the M6 is smoking hot at trashy sites due to it's recovery speed, tone id and coil selections. HH Bill