Which one is equivalent or even a tad "better" (for 160s) than the 7mm Mashburn Supermag? I have handload for simple necking down rounds .i.e 6.5/284, 6mm & 6.5/30-30 and 6mm/284 and afew necking ups, i.e. 6mm/222 Mag; 22/6mm Rem. But never fooled with bushings, two or three steps, neck turning/reaming/annealing, just haven't desired it is all. One reason I never went 7mm/300WM. I love them all, just no time and money, ha. I always wanted a 7mm Mashburn SM even when I got blistering speeds with the 140's and the big 7s.