✅ SOLVED Lead Button?

[Groundhogg]

I found this in a field with some flat buttons, buckles , and stuff. I've never seen one before but it also doesn't like any fired lead I've every seen. It's the size of a dime with no distinct pattern on the front but what appears to be a spot where a shank may have been attached. Any and all thoughts are welcome.
Thanks for looking

Update: Thanks to Blossom and further research I can mark this solved. It is a lead button! (My first)

 

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[DownEast_Detecting]

nice, congrats on your first lead button and congrats on solving a "what is it" without a single reply! 👍 Nice work!