Hi guys, I live on the Australian goldfields and metal detect, the by-products are often very interesting and give an excellent snapshot of the area's history. I find these rounds a fair bit, reading Steve T's excellent beginner guide (thanks! ) am I right in thinking this American round is from an aircraft? There were Americans training here during WW2, but I just wondered why these things would be in the middle of a forest. Shotgun shell base in last pic for size reference.