Is there anything more sensitive than the standard 8 x 9 concentric on small coins?

[Detector Wars]

So we're not going for .2gram nuggets here... a small coin like a dime is still a decent size. What is the optimum coil for a dime-sized coin and a coin that's 1.5 times wider in diameter than a dime?

I use a Golden µMax.

 

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[Treasure_Hunter]

The larger the coil generaly the deeper you will go, i hunt with minelabs and 15 inch coils, i am getting 15 inches with my dd coils on coins and jewelry.