Lyman Pro Maximum Cartridge Gauge 45 ACP Stainless Steel

The Lyman Pro Maximum Cartridge Gauge is a precision ammunition measuring tool built for the competitive shooter and serious reloader. Inspired by Lyman's Pro Die Sets, this gauge verifies that your loaded .45 ACP pistol ammunition falls within SAAMI specifications for case length, case diameter, and overall cartridge length, so you can identify out-of-spec rounds before they cause feeding or chambering problems at the range or on the line.

The gauge is precision machined from corrosion-resistant stainless steel in a bright silver finish, giving it a long, rust-free service life even with regular exposure to case lube, brass residue, and shop solvents. The outside flats are sized to roll smoothly in your hand and sit flat on the bench, and the unit is caliber-specific, machined to exact .45 ACP dimensions so reloaders can sort and verify ammo with confidence.

Whether you're loading for match competition, casual range practice, or simply want to confirm that factory ammunition meets spec, the Pro Maximum Cartridge Gauge is a straightforward, no-guesswork tool that belongs on every reloading bench. This is a current production Lyman reloading accessory, sold as a single gauge sized specifically for .45 ACP.