I mainly hunt relics in the cool weather and have dug the deepest bullets I have ever dug in over 40 years.
Nice deep flat button and quite a few spencer shells in a place that I rarely dug one due to their depth.
One of my last hunts before the heat got me I dug a perfect whole spencer bullet and cartridge.
It is also sensitive to percussion caps in the CO 50 mode.
I use low trash also, deep on, open screen and check the iffy signals.
A bullet 14-16" down is not going to give a great signal and/or target ID, that is why I find them and most people don't or never will.
Great machine too if you are expecting any rain and don't mind if you get wet. Friends I know love theirs on the beach as well.
I also set a personal record in this small patch of woods with 21 bullets in about 3 hours after I had hunted it with a V3I about 15 times averaging 12 each hunt.
The V3i is no slouch either since I got some 14" measured with it.
Just want to add, we have good ground here so not sure how it would do in bad ground
Jerry