I found this metal detecting

[bstromgren]

I don't know what it is but it went off I'm new help me out. It feels like a rock or like old bullet

 

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[jeff of pa]

tuff from the pic

Melted solder ?

 

[Coinstriking Michigan]

Melted pop can maybe.

 

[Tom_in_CA]

I don't know what it is but it went off I'm new help me out. It feels like a rok or like old bullet

Michigan is right : It's probably molten aluminum can nugget.