Reloading? For 7.62x39? Just where am I going to get affordable brass? 99% of all milsurp 7.62x39 is berdan primed and steel cased. Reloading steel cases really isnt all that big of a deal, but reloading berdan primed brass is insanely difficult and time consuming, not to mention the fact that berdan primers arent particularly plentiful and easy to find.
I could buy commercial soft point bubba hunting ammo from Wal-Mart or somesuch and get a brass boxer primed case, but I'd have to pay nearly $1/round to get that. So the only other option is buying unfired and unloaded brass from someplace like MidwayUSA. Whats their price? $260 for 1000 Winchester virgin 7.62x39 brass. Yeah, right. Are you going to miraculously convert all those berdan primed cases into boxer primed?
Then theres the issue of bullets. Ideally, you should shoot .310" bullets in 7.62x39. How much are those? $120 for 1000 Hornady 123gr FMJ bullets. You *CAN* shoot pulled milsurp .308" 147gr FMJs in a 7.62x39, but they are likely to be a lot less accurate and almost certainly wont shoot POA on a rifle thats sighted for standard 123gr. 7.62x39.
Reloading for 7.62x39 just isn't that feasible, even at the current crazy prices of Russian steel cased ammo.