1st time using Xterra 305 pensacola

[Lord E-Z]

My son and I did our first beach hunt today. Had fun and found lots of beer cans, soda cans, bobby pins etc. we then decided to go hunt an old home foundation near by and found all sorts of junk. Was almost done when we found these two bullets...wow!
Not sure what kind but they look different and were about 4 inches deep in the same general location. Anyone have a clue what kind they might be?

Michael E-Z Amstutz (Minelab Xterra 305)