I have had 3 SKS's none shot better that 5" groups and 2 mak 90's of which one would shoot near 4" groups and 1 mini 30 which didn't shoot as good as the SKS'

They sure are fun and cheap to shoot. I see that interarms makes a bolt rifle in the 7.62X39 and I think maybe ruger also. I would like to see how that would work out.
The 7.62x39 will shoot flatter and carry more down range energy than the 30-30 because you can shoot pointed bullets with it. I would say they would have plenty of knockdown at 200yds. The problem is being able to hit anything at 200yds.