I have some of that ammo as well - I noticed it does not have the NATO "+ in a circle" on the headstamp, so not being claimed to be NATO-spec. Is not being claimed to be Match quality, either. In our Model 70 Winchester 308 Win, it delivers much poorer groups at 100 yards than our 165 HotCor hunting loads - about 50 rounds fired off, from sandbags, over several sessions, to establish that. But your experience, with your rifle, might pan out differently - should not be a surprise? I bought it as a "less expensive", "less work" option to loading up plinking rounds. I think it would be fine for use in this rifle where guilded edge accuracy is not required. I have seen nothing to cause me concern about any "safety" issue, at all.
I have bought one and mostly finished building another in the style of late 1960's heavy barrel PALMA rifles. Both are 7.62 NATO chambers. With Parker Hale and AJP aperture sights on front and rear - that I have to learn how to use. I suspect that once I can get into that 12" or so group at 300 yards with that Hirtenberger, I probably should look at making some "better" ammo, but for my purposes, just now, I think it will do just fine... And, I am a ways from my objective - 65 year old eyes do not help!!!