I have proven to my satisfaction that the7.62X39mm is an extremely accurate cartridge! How well it will shoot depends on three things: The precisoin with which the rifle shooting it was built,how uniformly the ammo you are using was assembled, and how well the ammo matches the requirements of that particular rifle. In other words, the same things that determine the accuracy level of ANY rifle-cartridge combination. IMO, there are poor/inaccurate BULLETS, but very few inaccurate CARTRIDGES!

I will concede thatthe 6.8 SPC will shoot flatter, but the accuracy of the 7.62X39mm cartridge is NOT in question! Don't forget, the PPC rounds were originally made from 7.62X39mm brass (in the form of the .220 Russian)

FYI, ballistics has nothing to do with accuracy, and vice-versa. For example, the .45/70 has very "poor" ballistics, but is an extremely accurate cartridge, if loaded correctly and fired in an accurate rifle.