No idea !!

[JustKeepDigging]

Not sure if its anything good, but im curious as to what they are! Found here in south Florida in the woods.

 

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[Back-of-the-boat]

Can you put something with them for a size reference like a quarter or a dime.

 

[TheCannonballGuy]

You found a 20th Century rifled-shotgun slug, and a 20th Century copper-jacketed bullet. To determine the caliber, we need super-precise measurements (in 1/100ths-of-an-inch) of their main body's diameter where it isn't flared outward by impact.

 

[Sticks907]

Does look like a slug and a reference object will help.