Medium action builds deliver more case capacity and bullet performance than short actions can handle, but finding quality reamers cut to the right specs is a scavenger hunt. Most tooling is built around short or long actions, leaving medium wildcats as an afterthought.
Sherman medium action reamers are custom-made by JGS or Manson specifically for Sherman cartridges. High-speed steel with removable pilots for clean, precise cuts. Carbide versions are available from JGS for high-volume shops that need the extra durability.
These reamers are part of the Sherman matched system. Brass, dies, and gauges designed to work together so your build isn’t cobbled together from mismatched components. We prioritize keeping head-stamped brass reamers in stock, though availability can vary. Call or email for current inventory if you need confirmation before ordering.
The result is a chamber that lets your medium action cartridge perform exactly as designed, with the precision and reliability that makes the build worth doing in the first place.