From Chuck Hawks site
Cartridge MV (fps) MV (fps) V@200 yds ME (ft lb) E@200 yds
30-30 Win. (150 FP) 2390 1605 1902 858
7.62x39 (125 Sp) 2365 1783 1552 882
-Wolf 154gr SP moves at 2104 fps with 1514 ft lbs @ muzzle and 897 @200 yds.
-Handloads for each cartridge will improve them both (of course!!!).
-Here's some neat info on guys experimenting with some 7.62x39 handloads in a longer barrelled rifle - "http://www.accuratereloading.com/76239.html"
Pushing 210gr Berger's @ 2009 fps, or 240 gr Sierra Matchkings @ 1914 fps in a 7.62x39 sounds sounds way cool to me. Now if my SKS could do that...
Anyways, if you're hunting, there's no way the game will tell the difference between a 30-30 and a 7.62x39, no way.