I usually don't post on CB; I use the site to learn but I have to share my recent acquisition. Been looking for a stainless DW from the Monson MASS plant, in 32-20, for several years... Three chambers gauged at .313" and the remaining at .312"(minus pin gauge set). Bore slugged at .3115". Of course, I only have a .312" Star sizer die so I'll have to order a .314" from Chris.