NEED ADVICE ON PRISM IV

most old coins are in the 1 to 6 inch range. i would think that the prizm 4 should be able to get down to at least 4 or 5 inches. it may not find the super deep stuff, but it should work fine on average depth targets i would think. just remember to hunt slowly and overlap all of your swings. if it feels like you are just crawling along at a snails pace you are doing it right! ;)
 

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