A different 30mm XM140 WECOM round?

The photo below was posted on my forum. Clearly, the round of ammunition next to the gun is not the 30x100B WECOM round which I have always associated with this gun.

Can anyone identify it? Was it an alternative to the 30x100B in a different version of the gun? Or just an odd round which happened to be available when the photo was taken?

Sorry, I can’t upload the photo but it’s in message #9 in this thread: forums.delphiforums.com/n/mb/mes … msg=3701.1

There you are Tony


Thanks Steve!

Does anyone know what this is?