Performance-wise, the 7.62x39 is near-identical to the 30-30. It also has a near-identical case capacity and pressure rate, which means for you that load data just became incredibly easy to find since 30-30 data has a LOT more options in all the manuals. Load--shoot--enjoy. For powders, the two I use in x39 are H335 and 2400, depending what I'm doing with it. Both are not only good performers in the cartridge, but I use both in several other cartridges as well--I hate having a powder that has only one use.
If it makes you feel any better, I don't just reload for 7.62x39, I even swage my own jacketed bullets for it now. So if anyone is laughing, send 'em my direction.
