I originally posted the photos below back in 2008, seems they got lost along with a lot of other stuff when the forum had the problem.
Browsing through the latest issue of the IAA Journal I was surprised to see a question on page 14 regarding a cartridge exhibiting the same traits as the two I have.
All I know about the spent cases is that I picked them up on a military range sometime between 1984 and 1994. If memory serves the range was somewhat disused and the spent cases were discovered while doing the mandatory police call for brass while shutting the range down. These two case were clearly different from anything I had seen before and I hung onto them asking around for an explanation of the holes in the cartridge case shoulder. I never got a satisfactory answer.
What were these thing fired in, are the holes fired formed or were they in the case before firing?
Someone out there knows the answer, thanks.