I've reloaded 7.62x39mm in the past. You can load better bullets for hunting, but due to the design of the cartridge, reloaders can't push much more out of it than the factories can. You can get better bullets, but ballistically they are going to be very similiar.
I've asked myself why do I waste the time reloading for this caliber? Factory ammo is cheaper than you can load it, although your stuck with FMJ then.