Lyman 7705003 Pro Maximum Cartridge Gauge .45 ACP Case Checker

The Lyman 7705003 Pro Maximum Cartridge Gauge provides precision case length and overall cartridge dimension verification for .45 ACP ammunition. This machined steel gauge eliminates guesswork in ammunition preparation, ensuring consistent chambering and reliable feeding in semi-automatic pistols. Reloaders depend on this tool to verify proper case dimensions before seating bullets and after final assembly.

What Makes This Different

Unlike basic drop-in gauges, the Pro Maximum design features precision-machined chambers that check both minimum and maximum case dimensions simultaneously. The gauge validates case length, overall cartridge length, and proper headspace in one operation. Manufactured to SAAMI specifications with tolerances held to ±0.001 inches, this gauge provides laboratory-grade accuracy for serious reloaders.

Key Features

• Precision-machined steel construction with SAAMI specification tolerances
• Dual-function design checks case length and overall cartridge dimensions
• Go/No-Go chamber design prevents oversized ammunition from chambering
• Hardened steel construction resists wear from repeated use
• Compact 3.5-inch length fits easily in reloading bench drawers
• Knurled grip surface provides secure handling during inspection
• Compatible with all .45 ACP case manufacturers and bullet weights

This gauge proves essential for competitive shooters who demand consistent ammunition performance and reliability. Cases that pass through the minimum chamber but fail to fully enter the maximum chamber indicate proper sizing. The tool identifies oversized cases before they cause feeding malfunctions or extraction issues in match pistols. Reloaders processing large volumes of once-fired brass rely on this gauge to sort cases quickly and maintain quality control standards.

Technical Specs

• Caliber: .45 ACP (11.43×23mm)
• Material: Hardened tool steel construction
• Length: 3.5 inches overall
• Tolerance: ±0.001 inches to SAAMI specifications
• Weight: 4.2 ounces
• Finish: Natural steel with protective coating
• Compatibility: All .45 ACP brass manufacturers
• Country of Origin: United States

The Lyman Pro Maximum Cartridge Gauge represents a critical quality control step in ammunition preparation. Professional reloaders and competitive shooters recognize that consistent case dimensions directly impact accuracy and reliability. This gauge eliminates dimensional variables that compromise ammunition performance.