Some of the AP stuff actually has a steel jacket
and will harm your rifling in a short time.
What I had was in 9mm Parabellum and came on
10 round stripper clips. I think it was Chech or Yugoslav.
The Tracer rounds I have fired deposited some sort of white
dust or soot in the bore, but did no apparent damage.
The primers on these types of rounds can sometimes
be quite hard, so watch your firing pin.