I'm looking at building a 257 Weatherby. Weatherby brass for this caliber is rather spendy, although I hear it's nice since it's made by Norma.
I read that you can neck 7mm Rem Mag brass down in one pass through a 257 Wby die, but that it ends up a bit short.
Since the 257 Wby is based on the 8mm Mag case, would it work to just neck (and then maybe trim) 8mm Mag brass down? Coud this be done in one pass through a 257 Wby die?