Got this much in about three hours worth out of the ground with the ACE 300 International version. No tot-lots either. Got these popping up targets out of the grass with only a screwdriver and pro-pointer. It is soooo fast. The deep ones stayed in the ground, as the goal was quantity of coins. Below is a link to a video on how to dig 2-3 x more coins using my method of coin popping.
https://www.youtube.com/watch?v=DoLvboex7sM