What kind of bullets are these?

[BenVa68]

I found these along with a lot of other things mostly from the 20s today. The was a battle during the civil war at this location but I haven't found any relics yet. I am curious about the age and possible dates of these though.

 

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[Charlie P. (NY)]

The first two (same object) I am not sure are/is a bullet.

The next two (same bullet) appear to be a modern copper jacketed bullet. Someone shooting a .303 British or 8mm Mauser war surplus rifle. Both would be 20th century to now.

 

[BenVa68]

The first two (same object) I am not sure are/is a bullet.

The next two (same bullet) appear to be a modern copper jacketed bullet. Someone shooting a .303 British or 8mm Mauser war surplus rifle. Both would be 20th century to now.

I wondered about the first one myself. It is lead and appears to have crimp marks at the base but the shape of it was strange.