For what is avail today i'd rank 7.62x39 in this order of desirability. (I am ignoring Hornady, Winchester, Federal etc.. because they are harder to find and higher cost & never tried privi-partizan)
#1 Sellier & Bellot - brass and shoots great, consistent
#2 Barnaul - very consistent, similar accuracy to S&B, soft tips on SP better for bolt actions.
#3 Norinco (non-corr)- mostly consistent, always fire and well sized. works great in my SKS's and CZ527's
#4 Corrosive stuff...….
#5 Can-Ammo reloads - inconsistent, some rounds so not chamber even in SKS. Those that do chamber have all fired though.
I'd rank my pricing by the list as well. I'd never pay more for Norinco than I would for Barnaul. In fact unless your going hunting and need Soft Points i'd just recommend Barnaul ammo 100% in the 7.62x39 calibre.