Lyman 7705100 Pro Headspace Gauge .223 Remington Field Gauge

The Lyman 7705100 Pro Headspace Gauge provides precision measurement for .223 Remington chambers, ensuring safe ammunition headspace and preventing dangerous overpressure conditions. This professional-grade field gauge delivers the accuracy gunsmiths and reloaders demand for chamber verification and safety checks.

What Makes This Different

Unlike basic go/no-go gauges, the Lyman Pro Headspace Gauge offers continuous measurement capability with precise graduations. The hardened steel construction maintains dimensional stability under repeated use, while the etched markings resist wear from chamber insertion. This gauge measures actual headspace dimensions rather than simple pass/fail testing, providing quantifiable data for chamber analysis.

Key Features

• Precision-ground hardened steel construction for dimensional accuracy
• Etched measurement graduations resist wear and remain legible
• Compatible with .223 Remington and 5.56x45mm NATO chambers
• Professional-grade tolerance specifications for gunsmith use
• Compact field gauge design for range and workshop applications
• Heat-treated steel maintains accuracy through repeated measurements
• Clear measurement markings for precise headspace readings

This headspace gauge performs critical safety functions in ammunition development and rifle maintenance. Reloaders use it to verify case dimensions before loading, while gunsmiths rely on it for chamber inspection during barrel installation or modification. The gauge identifies potential pressure issues before they become dangerous, making it essential equipment for anyone working with .223 ammunition or AR-15 platform rifles.

Technical Specs

• Caliber: .223 Remington/5.56x45mm NATO
• Material: Heat-treated alloy steel
• Finish: Precision ground with etched markings
• Tolerance: Professional gunsmith grade
• Type: Field headspace gauge
• Manufacturer: Lyman Products Corporation
• Model: 7705100

The Lyman 7705100 Pro Headspace Gauge represents essential safety equipment for serious shooters and professionals working with .223 ammunition. Its precision construction and reliable measurements make chamber verification straightforward and accurate. This gauge belongs in every reloader's toolkit and gunsmith's workshop where safety and precision matter most.