I have been wanting to redo one of my Carcanos to use the 7.62x39mm cartridge too. Having one in .35 Remington would be really awesome too. Maybe I will get around to doing it one of these days. I also have some Carcanos made in 8x57mm too. I did not see them as being too weak for the round either. I have other guns to shoot, so I haven't been too motivated to trying one out yet though.