Well, one appeared to be 9mm, and the other was actually labelled 5.56. You can see where the forward part was crimped on. The "primer" didn't really look like a primer, so not sure if anything fired out of it. The hole in the tip is somewhat smaller than the bore of the appropriate bullet, so if something was expelled, it wouldn't have been very accurate. The guy that runs the range didn't know what they were, and he's quite the ammo guru.