I don't like to say how deep I have dug things as the actual depth of an item I have dug could be clouded by the excitement of the find. but I have dug things with my troys that have been pretty impressive depth wise. just yesterday I got a faint but audible and repeatable signal in a field I have been hunting..It took me 6 scoops with my shovel which is an estimate 15-16" when you take in account that I wasn't digging straight down. The target turned out to be a large copper,most likely a large cent but due to the awful condition of the coin I am unable to determine its true identity. take it for whats it worth but the troys really do amaze me and nothing can convince me there is a better machine on the market for my type of hunting.
I own quit a few machines and over the years I have built a rather large and very thought out test garden,I like to think I have come up with most every variable possible in my "garden" to put any machine to the test. out of all my machine I have 3 that are able to detect most every target I have the best of the 3 is the shadow X5 next is the tesoro tejon and the 3rd is the shadow x3. like I said my garden will test the power of any machine but there are some things I am not able to duplicate that happen in the field such as HEAVY mineralization,electrical interferences and what could happen to a targets composition when said target is in the ground for a very long time...my garden is only about 10yrs old and every year targets I have planted change the way a machine picks it up but it will give you an idea of the power of said machine and is great for learning a machine or at least off setting the learning curve. like I said take it for what it worth...experiences may vary....void where prohibited...only one entry per person and if you live in Rhode Island don't even bother