ORIGINAL: Briman
7.62x39 in an SKS.
I agree with Briman, I don't like the steel buttplate on the SKS though,
but SKSs are very cheap. A 7mm-08 would be a good gun, but it's way too similar to the .280. It would work fine,but it's always better to have a diverse gun collection. A .25-06 or .243 would be good. 30-30 is a thirty caliber, and it will kicklikeone.
BTW, I don't have a .243, I just wanted to add numbers after myname, I like the 7mm-08 myself.