My experiences with Prvi are limited to rifle ammo. It isn't the most accurate, but for the money it is way better than anything else in the price range. The brass is boxer primed and reloadable. I think it is very good brass. I reload 7.62x54r and 7.5x55 swiss with it. Both have been loaded several times and the brass still looks almost brand new.
My understanding is that Prvi and Wolf Gold are the same thing, just packaged different.