I don't have a 8x57 but I do have three 7x57s. Does anyone know where I may buy Lapua 7x57 ammo or brass? No, well that is why I am thinking about buying 8x57 Lapua brass and running them thru a 7x57 die. That should work, right?
Necking 308 Palma Lapua to 260, the necks need to be turned to fit in a chamber made with a standard reamer.
Necking 8x57 Win brass to 7x57 and then to 257 Roberts, the necks do not to be turned for a standard reamer.