7.62 X 39 or .308
Depends how you define "better."^^ You just like arguing ^^ Why not answer the question instead of picking a fight?
Yes, .308 IS better than 7.62x39 and it is fairly common in most communist countries in the form of the AK47. Pretty much bet there is very little to no demand for a low power communist cartridge in a bolt rifle or you'd see one.