Yes, the white tip is the color code for "reference" ammunition, or more properly, "Ballistic Standard". This ammunition was/is used to calibrate test equipment such as chronographs, and such, to establish a base line of the "standard" for the caliber for comparing new lots of ammunition as they are produced. This "Etalon" stuff was most likely surplussed due to age. IIRC, the headstamps I've seen indicate it is 20+ years old or more. Some folks mistakenly beleive that this ammunition is match grade or something, but it is not and was not intended to be. It was produced to be uniform and consistent, nothing more. This is why, plus age possibly, people who have shot this ammunition claim only average accuracy. Since a ton of this stuff has shown up, it's collector value has dropped considerably. Most likely your stuff has Polish or Hungarian headstamps, not Soviet. Post your headstamp info here and I'll tell you exactly what you have.