Found old bullet in Ontario?

[Edgenation]

Hey everyone I know you find civil war bullets all the time in the U.S. So 1 bullet is usually not a big deal, but this is a first for me. I found this lead bullet in central Ontario
Just on a lake shore while metal detecting. It looks like it has 4 rings?
Would anyone be able to identify this and maybe throw a time frame on it? I'm wondering if I should go back to this area and continue searching.

 

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[Davers]

That's a tough one IMO, Is there Wood or Even Iron/Steel in the Cavity?

As I have said Before Hunt the area again Cause "You never Know"
GL Davers