Dug the bottom portion of a Confederate Reed shell at 19 inches deep in a farm field. As far as coin, I pulled a Barber quarter at 11 inches in nice, black dirt. The deepest mine-ball I dug was a dropped .69 at 13 inches. All with a Minelab CTX-3030.
Just a couple months ago i got a signal and dug down over 3' for a piece of iron, it was a 10" 3 legged spider skillet that was 2/3rds complete but had handle and all. also 10 years ago i dug over 2' for a 12 lb cannon ball complete.... one of better finds... When i dug the skillet i pulled up charred wood from a fire and also there was 3 ringers and p- caps around the area.
I thought gay early 1800s French cannonball and it was about 2 1/2 feet down and I will mail it was slow to fill that hole back In this Louisiana mud clay
4 ft., when my dad wanted me to dig a new tile line for our septic. It was 4 feet down, 3 feet wide, and 20 feet long (with hands and shovel, not a tractor). That's when I was young ! Never did find any treasure in that trench.
The hood and top was as far as I got, I found out later that it may have been a land fill area. And yes it was full sized with some paint left. There were some off colored sounds coming from me as I restored the area back to its original contour.