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The Lyman Pro Maximum Cartridge Gauge for 9mm is a precision measuring tool built for reloaders who need to verify ammunition dimensions before they hit the range or competition line. Machined from stainless steel, this gauge lets you check three critical aspects of your finished rounds—case length, case diameter, and overall cartridge length—so you catch out-of-spec ammo before it becomes a reliability problem or a range safety issue.
Unlike basic gauges, the Pro Maximum design includes practical features that make regular use less of a chore. The outside flats keep the gauge from rolling off your workbench, and the o-rings give you a secure, non-slip grip even with sweaty hands after a long reloading session. Stainless steel construction resists corrosion, so your investment stays accurate year after year without rust creeping into the precision surfaces.
Competitive shooters and serious handloaders rely on 100% ammunition inspection as a non-negotiable step before trusting their rounds downrange. The Pro Maximum Cartridge Gauge for 9mm makes that inspection faster and more reliable than eyeballing or hoping your dies are perfect every time.
The Lyman Pro Maximum Cartridge Gauge for 9mm measures case length, case diameter, and overall cartridge length.
This gauge is specifically designed for 9mm cartridges. Other caliber versions of the Pro Maximum Cartridge Gauge are available separately.
Yes. Stainless steel is corrosion resistant and designed for long-term durability in a reloading environment.
Top competitive shooters use cartridge gauges to inspect finished ammunition for consistency and safety. Verifying case length, diameter, and overall cartridge length helps ensure 100% reliability and consistency for precision shooting.

SKU: 144598255 • Weight: 0.5oz