Boyd Allen
Active member
Today I had my first chance to look down the bore of a Benchmark 2 groove barrel. The first thing that came to mind was to wonder how one rigs a chamber reamer's pilot for one, given that there is so little land width to work with. It almost looks like you would need to cut clearance in the pilot so that you could have half on the lands and the rest on the grooves, or perhaps pre-bore, and chamber without a pilot. How have you done one of these?