I"m new to the Ace 250 but have been detecting with other machines. I have only used the Ace 3 times but it seems to ID coins wrong when they are over 5 inches. I've dug maybe 15 coins that the machine said 1 thing but the coin was not what it ID. Usually it read dime but I found pennies or once in awhile I dug quarters. It also reads dollar quite a bit. I have not dug up the dollar reads because it was happening far to often.
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