✅ SOLVED found this in creek bed ..lots of mining went on here back in the day ..im in gold country northern Cali..its very heavy and magnetic..cannon ball?

[Carriejuice]

 

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[crashbandicoot]

View attachment 1984229

i,ve seen others like that on here and judging from where you found it I imagine it,ll be IDed as a mill ball.Guess on my part.Someone with more knowledge will be along to Positivly ID it.

 

[Jim in Idaho]

That's exactly the first thing that popped into my mind. Mill ball.
Jim