Has anyone here used the RCBS X die? A friend just ordered one, (hasn't arrived yet). It apparently prevents the case from getting longer by engaging the mouth during resizing. I also read somewhere that it was suggested to initially trim the case 0.010" below spec prior to initial reloading, i.e. 1.740" for .223Rem. I was wondering if anyone here has used one, and what you think about it.
