I have been reloading 7.62x39 for an AK for a bit now. I can make top of the line Hornady 123gr rounds for about $6.50 per 20. I can make some nice plinking ammo for about $3.00 a box of 20. I think it's getting to the point where it makes total sense to reload Ruski ammo. The stuff I see at my local stores is well above $6 a box of 20 Wolf ammo..
I'm currently in the process of collecting up some 7.62x54R brass to reload for my Dragonov, cause that milsurp ammo is crazy expensive now in my neck of the woods.
If you can collect up some brass it is well worth it..