[Marcello]

Some additional comments.

Yugo combat loads tended to privilege antitank rounds, because the expected enemy was the soviet union and its large tank tank fleets.

The soviets were very particular about selling BM-8 APDS. Despite the fact that by the time it reached operational status it was hardly high tech its sale was often denied for years to non Warsaw pact nations, despite pressing requests for it.
This created the paradox that several countries fielded T-62s (and associated advanced APFSDS) years before they were allowed to get their hands on a badly needed APDS for their T-55.
It should be noted here that BR-412B/D were pretty marginal against tanks like the Patton series and were retained mainly because they were relatively cheap; the most effective antitank round was HEAT which, while it could destroy nearly everything it would face, was not super accurate.
Therefore an APDS was badly needed; yet it took a long time to field it and even then limits were placed upon its proliferation, so much that by the end of the Cold War only frontline satellite states like the GDR had it in abundance. Iraq, Yugoslavia etc were still employing BR-412B/D for their
T-55s in the late 80's and beyond, with newer APDS/APFSDS available in limited numbers.