Found these

[RCS]

I have or should say had 500 rounds of the 22 INCH MARK 2 dated 3 - 1- 79. One of the boxes split opened. I now had the excuse to shoot some of these rounds, while not target cartridges, they seem to shooAttachment 104508t as well as the CCI standard velocity. Do not know if really a collectors item or not but I will save most of it.