FWIW, when a reloader wants to make a shorter case from a long one, like 8x57 from .30-'06, he should be aware that the neck is being moved to a point where the brass of the original case is thicker than at the neck.
That means that the new neck is thicker, and there might not be enough room at the chamber neck to allow case neck expansion and proper bullet release. If the neck is not reamed to the correct inside diameter, the pressure may increase beyond safe levels.
FYI, a poster has reported that in his WWII German rifles the bolt won't close on that Romanian 8x57JS (7.9) ammo. I suggest not making a heavy investment in it until you can check it out.
Jim
That means that the new neck is thicker, and there might not be enough room at the chamber neck to allow case neck expansion and proper bullet release. If the neck is not reamed to the correct inside diameter, the pressure may increase beyond safe levels.
FYI, a poster has reported that in his WWII German rifles the bolt won't close on that Romanian 8x57JS (7.9) ammo. I suggest not making a heavy investment in it until you can check it out.
Jim