I have some real strange ground,it has magnetite and alkali.Both iron mineralization and salts.In some places the ground is snow white from the salt mineralization.Certain places I hunt the coin ID changes.Pennies can come in as dime and sometimes quarters,dimes hit as pennies a lot,quarters come in as 50 cents,pennies even copper ones hit one or 2 notches below pennies.Now I dig any repeatable "coin signal"If it's close to the bottom of the penny notch and repeatable it gets dug.As recommended by guys on the forum I dig all A,B and C sized targets.I spend a lot of time making sure the target is center when checking the cursor.I love sizing,no more deep cans.