I found this at my local range yesterday. What really throws me off is how light weight the entire round is. When you shake .223 you can feel the powder shaking back and forth, but with this I cannot feel anything. The bullet is what really caught my attention. It looks like aluminum possibly? I searched a little and found nothing for this specifically. A lot on .45 acp "WIN NT" headstamp, but the bullet is obviously not the same. I guess it stands for non-toxic, maybe thats why it's aluminum?