7.62 NATO 'black tips'?
They shoot hot and kick like a mule. My ex was shooting a foot high at at least 500 yards, didn't manage to sight in. Don't know where there were gotten, but they didn't know what they were till I googled it. They were Lake City 1968, so they're still around.
Not worth it as Zed ammo, don't want to beat your rifle or your self up. Besides, what armor could they put on that would stop a full size rifle round?
EDIT: my bad, I speak of 30-06 AP