I have to see if I could get a picture of the rifle that shoots this ammo. Oh yeah the person that owns this does indeed like LONG RANGE target shooting.
Yes the ammo is indeed dummy ammo, 20mm case has a split neck, so no longer "good" to use.
I am sure that the rifle isnt too bad to shoot, well other than on the ears. I have "heard" stories of people jumping 40 positions down the line when they hear this thing go off. Considering hearing a 50cal go off at the range, gets my attention I beleive it. (even a M44 7.62x54R gets people attention)
I would like to touch off at least one round to see what it is like, then work from there.