Ran across a lot of ammo in brown cardboard boxes. From the website I have determined that it is Jugoslavian ammo. It told me when it was made, where it was made etc. but not the one thing I really wanted to know

Is this stuff any good, but mainly is it corrosive?

I really don't care for corrosive, and the bore is already dark but I just wanted to know

The ammo is marked NNY 1986

TIA
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