I hunt in the relic mode 100% of the time. I do this not only because I hunt civil war relics, but I also hunt old home sites. I like the high tone/ low tone signals. You can easily identify good objects by the high tone, BUT if your only digging good high tones you will leave good relics/coins in the ground. I start with disc at 2 and threshold barely audible but still easy to hear. I run the sens as high as I can and still keep the threshold steady not wavering. The key is listening for threshold rise. A good target that is closer to the surface, the MXT will hit easily with a good clear high tone, but deeper silver sometimes will cause the threshold to rise and not necessarily give a good high tone. Sometimes it will give just a peep of a high tone, sometimes just a rise in the threshold. If your getting a rise in threshold but not a distinctive signal, pinpoint to see what the machine is saying for depth. 4" and deeper is a good sign. Take off a few inches of dirt and recheck the signal. I dug a Indian Head penny the other day that gave a small peep of a high tone and then a low tone. It ended up being about 10" down. The rise in threshold stopped me first and after sweeping the spot over again a couple of times the high tone was peeping with the low tone. The screen was bouncing between bullet and iron and VDI #s were bouncing from the 50s to -10. Depth reading was reading 8". I rarely go by the screen but this is what it was saying. I learned a long time ago to dig the iffy signals as these are often good targets being masked by iron, trash, bad ground or whatever. The MXT is very good at sniffing these good relics/coins out of the ground. Bottom line, do more listening than screen watching, and listen for the threshold rise for the older deeper coins, they won't always give good strong signals especially if they are on edge. Dig hard and good things happen,
Jeff