Generic reamers don’t account for Sherman’s efficient case geometry and tight tolerances. You’re left improvising dimensions or hoping a standard SAUM reamer gets close enough. It usually doesn’t.
Sherman Short Action reamers are custom-made by JGS, Alpha Legacy, or Manson specifically for SST, SS, and MAX cartridges. They’re part of a matched system: brass, dies, reamers, and gauges built to work together. No hunting across suppliers. No adapting specs from forum posts.
The new B reamer design extends brass life at max pressure by refining the chamber geometry where it matters most. Available in high-speed steel or carbide with oil groove bushings for clean, fast cuts. Pair it with a GO gauge or skip it if you already have one for your cartridge family.
The result is a chamber cut to the specs these cartridges need to perform. No guesswork. No compromises. Just the performance you built the rifle for.