Small search coils vs medium on nickel counts

[CoinandRelicMan]

I've recently noted a trend in my searching. It seems that I always find "Many more" nickels when using my smaller version search coil vs the medium. Has anyone else noticed this?

 

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[Frankn]

You are probably notching out the pulltabs when using the larger coil. That is knocking out the nickels. Frank...

 

[CoinandRelicMan]

I use same setup for both coils. Here is pic of small and med coils.