If I would have to chose, I would always go for the 7.62x39. It fits into my collection, don't have to buy ammo and I have enough shoulder breaking calibers. I never saw anybody at my range shooting out to 300m, only me. Another bonus is that the missus has no problem with that round. She even shot a SKS last weekend without ear protection. The only thing she said was "It's a bit loud today". We both had a good chuckle. And yes, she has her license but I have to buy, lol.