I know that Minelab detectors are used primarily to find old deep relic items and silver coins. I do quite well in that area myself. So far this year i have 197 silver coins and one US 1901 $5 gold coin. But this post is about adapting to where you are and what you expect to find. I have learned that in order to hunt for modern coins, especially here in Canada, that you must remove all discrimination and hunt wide open. I call it hunt the grunt. And it helps immeasurably if you reduce the sensitivity.
The sensitivity setting will depend on which coil you are using. If you are using the stock 11" coil or the 5 X 10 Coiltek coil a setting of 5 will be good but if like me you want coverage and use the 17" bigfoot coil a setting of 3 is preferred. This way you are only scanning the ground to a depth of 2"to 3" on coin sized objects. A quick wave of the pinpointer over the target will confirm a surface find or some deeper iron object. Over the last three days hunting at a local park i have recovered a total of $112.85 this way. And three silver rings as a sweet kicker. The photos are the clad totals from the three days of hunting.
Bruce – British Columbia, Canada