The guy on the forum that has the most silver, or close, for the year, runs 10 gain. He also uses 32 Auto.
I run 10 Gain with everything even the WOT. And <i>hear</i> is why...
I was real good at picking out the extremely faint targets with 5 and 6 gain, but I still made the switch and now that I have used it a while, I don't see going back anytime soon. I think my silver count is up since I have. Anyway, I have had friends with an Explorer go over faint targets I have found. Here is what I did, I found a deep target and called them over and and made a 4 foot or so circle. I told them that somewhere in that circle is a target I would dig and a lot of trash items. Find it and tell me what it is. They couldn't even find it most of the time. One time I even watched one guy swing his coil direcly over it 4 times and he missed it. This doesn't mean much except that it is easy to miss some of the super faint targets with a lower gain. Sure you find a lot of the targets, but you will go right over some of the deep ones and miss them because they are so faint that they don't grab your attention long enough. (I am talking newer users here)
Now with that being said, gain 10 does <b>not</b> go any deeper than any gain setting, it just makes everything sound equal and makes the deep iffy hits stand out well enough to grab your attention so you further investigate. I have found deep targets and ran my gain down to gain 3 and it will still get them, but we couldn't use it hunting, we would miss a bunch because we wouldn't hear them good enough.
Gain 10 is definitely not good for newer users to try, it will probably cause you to miss targets. But gain 10 in the hands of someone that can handle it does great. More "pros" use high gain than you realize. Maybe not 10, but I sure know a lot of people that use at least 8 or higher. I think a higher gain helps tell deep iron from deep iffy coins better, but that is just my opinion and I wouldn't bet money on it till I actually took the time to check iffy signals with different gains.
Now, I am not saying for you to use 10 gain, not at all. I am just saying that after you have a couple 100 hours in on it, you might try it again.
My two corroded zincs