You gave me an idea Bravo,what about an all copper bullet say a Barnes Triple X.You can make a shorter bullet the same weight due to density.Cor-bon loads some 150's in their ammo,I don't remember the type of bullet or velocity though.
Ok sorry brainfart,maybe what I was thinking is that a lighter copper bullet expands and performs like a heavier bullet.In other words it doesn't have to be as heavy to get the same terminal performance and penetration.
Not enough case, 7.62x39 for either the bullet or powder. A bullet as heavy as the 150 gr .310 or 3.11 would sit too deep in the case. For an AK or SKS the 130gr bullet is about the heaviest loadable (with safety in mind). I would stick with what it was designed for a 120 - 125 grain bullet. A Barnes all copper in 125 grains would be whipass. :2cents: ;D Same goes for an AR or XCR in 7.62x39, the heavier the bullet the deeper it would have to sit in the case to fit the magazine. :2cents: