A friend was moving and gave me some 30-06 ammo he didn't want to pack . I did a little research and it is from the Utah plant and corrosive primed , the head stamp is a U at 12 o'clock a 4 at 7 o'clock and a 3at 4 o'clock , is there anything interesting about this ammo or do I just have some free shooting with the usual corrosive primer cleanup