I have been using Prvi brass in several chamberings for awhile now and in general have had good results with it. I have had a few cracked necks in some 6.5X55 brass that were only fired once and some of the same cases cracked in the neck area while being reformed to 8X54. I annealed the whole bunch and eliminated that problem, but this has been my only issue with it so far.
I have had zero issues with any of the other cases I've worked with. I personally think that Prvi should receive a medal of some sort for providing shooters of milsurp rifles in what used to be considered oddball calibers, a source of reasonably priced, good quality brass. My opinion only, others may have different mileage.