I will admit that the 7.62x39 is not the greatest round out there by a long shot. But some people seem to think it hits a brick wall at 200 yards. Why I have no idea.
Yes it does have considerable drop. But the sights on an AK or SKS are made to take that into account. I guess that means that 5.56x45 or .223 if you will won't kill anything bigger than coyote's.
We all have pet rounds and guns. Some of us like a little recoil, some a lot of recoil. So let's just let each other use what we want and go on from there.
What on god's green earth do you think your doing?