Lyman Pro Maximum Features The Lyman Pro Maximum Cartridge Gauge was inspired by the company s Pro Die Sets and is precision machined from corrosion resistant stainless steel for a long rust-free life on the reloading bench. Built around a 9mm Luger chamber with a .355 inch diameter specification the gauge allows a reloader to check finished cartridges for case length diameter and overall cartridge length before they ever reach a magazine. This level of inspection is considered mandatory by top competitive shooters who cannot afford a malfunction caused by an out-of-spec round during a match. Checking every round through this gauge gives shooters confidence that their ammunition will feed and chamber reliably when it matters most. Flat sides machined into the gauge s exterior prevent it from rolling off the reloading bench a small but genuinely useful detail during a long loading session. Fitted O-rings provide a secure non-slip grip making the gauge easy to handle even with dirty or oily hands. The stainless steel construction resists corrosion from repeated handling and powder residue over years of use. Reloaders who compete regularly and need absolute consistency from their 9mm ammunition will find this gauge an essential quality-control tool. Lyman Pro Maximum Specifications Manufacturer: Lyman Model: Pro Maximum Caliber: 9mm Reloading Diameter: .355 Color: Silver Material: Stainless Steel Country of Origin: USA Available At: GrabAGun