I know the Russians hold onto their stuff tightly. Around 1986-1988 the standard 7.62x54R LPS round was upgraded with a strengthened core:
Its says the change increased breakdown (I think they mean penetration there) 1.5 times.
I have, supposedly a few ST-M2 bullets & deactivated cases to go with them but without being some sort of scientist have no way of being able to 100% say, these are post 1988 LPS.
I’ve never found, or really even heard of any live ammo in circulation.
Has anyone here seen them in the wild? Thanks