While looking through info on replacing fmj bullets with hunting rounds and Mexican matching steel case ammo, I found these. If you’re hard up trying to find Soviet brass, and want to mess with reloading steel case, there’s a company that makes a kit to convert your steel cases to boxer primers. Just thought I would share.
http://products.russianreloads.com/15-partizan-mk-iv-conversion-systems
http://products.russianreloads.com/15-partizan-mk-iv-conversion-systems