Please don't think we are ganging up on you here or trying to knock a newbie around. Not our intent and I apologize if we've come across that way. We are mainly try to "get you up to speed" quicker on the realities of this hobby. Fact is that shallow wheats or war nickels are passed by many seasoned detectorists. They can often tell, by machine ID or just by traits/hints to the tone and ID, what a silver coin is versus a wheatie, and of course will pass anything else lower on the conductivity scale such as war nickels when they are just banging out the silver. We've got lots of sites like that around me. I can go into them and walk out with 10 or 20 wheats on a good day but not one stinking silver.
Why? Because somebody went in and ignored all the coin hits that didn't hint to being silver. Even if the machine doesn't ID silver coins from clads often the tone is a bit "sweeter" or the ID jumps up to "COIN" faster with a silver hit than a clad one. That's what is called cherry picking. The good news though is that even guys with the deepest machines often do this and pass any "wheat" or "clad" hits. But believe me, I've dug a ton of silvers that read like clads or wheaities, or heck even as zincs, due to orientation, minerals, being worn, being on edge, being masked, dry conditions, and so on. If they are passing "wheats" then they are passing silver by accident, especially when they pass on those 6" or deeper "wheats". Also, if they aren't digging all non-ferrous signals above iron, and honestly most of us don't dig that stuff, at least on most days, then there are still silvers to be found. Until you dig every signal above iron out of a site I never consider it hunted out, and even then there are still plenty of old coins being hid by iron. Even a small speck of iron, shallower than the coin, will completely mask it, and the iron doesn't have to be straight above it, just shallower than the coin.
So point being that just because shallow wheats, war nickels, or other targets are present, I can gurantee you that spot has been hit hard over the last 30 or 40 years. That is, unless it's on private land and nobody was granted permission before you. Just the realities of life, but then again if this hobby was easy everybody would be doing it and there wouldn't be no challenge. No public site is ever "dead" or hunted out. You must maintain that mindset and be willing to dig the real iffy coin hits everybody else thinks is not worth bothering with. The clean silver signals, shallow, deep, or otherwise, are mostly gone. Only when the soil allows coins to sink super deep, and thus beyond the range of most detectors, will a guy with one of the few machines that can go deeper find those deep clean silver coin hits. I have spots like that, where my 12x10 is punching deeper than at least most machines that have seen that site. But even with a machine and coil capable of going that deep, beyond the depth of most other guys, you must be seasoned at it and know how to work the coil, adjust the machine, and what to listen for, to push it beyond what some good machines can punch down to. That's when it's more about the man than the machine, when you are using a top end machine with a quality larger coil to get that extra bit of depth.
But on the flip side of that coin, a super small trash coil will work wonders to find the shallow silver that others have missed. At sites where the soil doesn't allow coins to sink beyond most machines, waste of time to wander looking for the deep hits IMO. All those shallower 6 or 7" silver dime hits are gone and no others can sink deeper that that beyond the reach of most machines or men. So waste of time to look for the clean "deepish" silver hits sink the soil won't permit that situation. Now it's time to strap on a small coil (like say 4 to 7" in size) and work slowly in between the trash. Don't curse the trash. Instead, be greatful, for now you are looking where most won't look, and with a coil that can give you results (use a DD). Don't hit the trash and move quickly past it. Instead, work around the edges of that pull tab hit for any hints to a high tone mixed in at the edges. You'll find shallow silver that way, but don't be in a hurry. Just like looking for deepies, the only ground you should be concerned about is right in front of your two feet. Work THAT spot. Don't be in a hurry to "get over there". The grass is never greener 20 yards away. When you have that mindset you'll walk into "dead" public sites and, with a good amount of effort and work, you will find silver others have missed.
Good luck, and remember it's far harder to cut your teeth and learn how to look for old coins at public sites that have been worked hard. Try to hunt private land for a while where you won't get frustrated. Once you've got enough experience in how to find the deeper or masked stuff then move on to the public sites. Or, at the very least, hit a modern school or park where the clad is plentiful. Working a dead site where coin hits are scarce is a good way to get turned off to this hobby quick. You got to pay your dues and take it slow before finding the stuff the guys for the past 40 years have missed.