To be clear, I am not advocating nor even suggesting that this can be done, let alone should be done, but I'm curious, in say an "emergency" situation when no .358 rounds are available, as to what effect firing a .308 cartridge in a rifle chambered for .358 might be. I'm guessing that the .30 caliber bullet would simply rattle on down the .35 caliber bore with little hope of being accurate and that the brass would conform to the larger cartridge's chamber but with no other serious ill-effect in terms of safety. What say you?