I'm just a green-horn at this finding and digging thing, thus my findings likely won't hold much water...so with that in mind...
My Mojave seems to work terrifically! Not quite as deep-probing as my Outlaw, yet a bit more so than my Silver uMAx. Seems the easiest to me to just turn on and start detecting...Has become "the One" I keep with me all the time.
Have yet to have any "falseing" from either of the three, always something in the ground when I choose to dig.
I'm assuming ground conditions play a larger role in any of this than most of us diggers realize.
I can run either Silver, or Mojave wide-open with no ill effects (that I have discovered anyways) other than increased depth, and stronger returns on shallower items. The Outlaw does act up a bit when I crank things way over to the right...Usually the threshhold is about noon to 1 o'clock-ish, sensitivity around 9 to 12 o'clock.
Concerning coils...I have the trio included with the Outlaw, the 7" coming on the Mojave, The "chocolate" 8" doughnut from the Silver uMax...my limited use has me going for the 8" open coils usually, the 12x10 if I'm in a wide open field setting, and lastly the 5.75" only if I'm in a very tight "brushy" area (all tot-lots are off-limits here in the County). Only perceived "advantage" I have found with the 7" is the weight reduction of an already light setup.
...Most will likely laugh at this, as all I read about on these forums are "how deep"? "Gained another 1/4 inch by crossing my left foot toes" "Gotta Super-Duper Tune to get the absolute last millimeter"...I actually run mine less than half on sensitivity, threshhold, whatever the adjustment may be...we have much gravel just a few inches down in most areas I have dug, and to me, it just hasn't been worth the time and effort to try and go deeper than the usual 4-6' that all of these detectors have no problem reaching down too.,
Thanks for reading, and all the great info you folks post
Jamie