50s Bulgarian 7.62x25 was on sale in the past 3-4 months. It’s not on the Oct special e-mail. However, it is still on sale at CAI web site. Most of them are from 1952. Either CAI has a lot of them or no one wants them.
I think its both AST76. The rom 762X25 is a lot better. The rom 762X25 is getting harder to find. I think CIA needs to keep the Bulg 762X25 or sale it for parts. At a way lower price. I used some bullets from the 762X25 bulg to reload some 762X54R very low recoil and good accuracy.