What specific ammunition dimensions does the Hornady 380701 gauge inspect?

The Hornady Cartridge Gauge 9mm Luger is precision-machined to SAAMI chamber specifications to simultaneously evaluate cartridge headspace, overall case length, rim engagement, and outer case diameter. It accepts standard 9mm Luger (9x19mm Parabellum, .355 bullet diameter) rounds as well as 9x21mm cartridges. It serves as a reliable drop-in pass/fail tool to ensure your handloads or factory ammo will chamber smoothly without feeding jams.

Can I use this gauge for other popular handgun calibres like .380 ACP or .40 S&W?

No, this specific model (380701) is strictly engineered for 9mm Luger and 9x21mm compatibility. It cannot be used to gauge other pistol calibres such as .380 ACP, .40 S&W, .45 ACP, or .38 Special, which require their own dedicated calibre-specific chamber gauges.

How do I maintain and store the solid steel gauge to prevent rust in humid Australian conditions?

The gauge is crafted from precision-machined solid steel without active electronic or electrical components, meaning Australian electrical certifications such as RCM do not apply. To prevent oxidation and surface corrosion during storage in outback heat or coastal humidity, keep the tool clean, dry, and lightly wiped down with a protective gun oil or rust preventative after each reloading session.

Is this single-station gauge suitable for high-volume batch reloading inspection?

The Hornady 380701 features a single-station drop-in capacity, meaning you inspect one round at a time. While ideal for precision quality assurance and spot-checking handloads, reloaders processing hundreds of rounds per session may find multi-hole checker blocks offer faster batch throughput.

9mm Cartridge Gauge - Hornady 380701

The Hornady Lock-N-Load® Cartridge Gauge 9mm Luger (MPN: 380701) is a precision-machined steel inspection tool engineered to SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute) chamber specifications. Designed for metallic cartridge handloaders and handgun competitors, this passive, drop-in go/no-go gauge confirms that reloaded or factory ammunition will chamber reliably. It assesses cartridge headspace, overall case length, outer case diameter, and rim engagement in a single step, identifying issues such as bulged cases, excessive case mouth flare, or improperly seated bullets without requiring an actual firearm barrel or manual caliper checks.

Key Features

SAAMI-Spec Chamber Simulation: Machined to exact SAAMI chamber tolerances to serve as a definitive drop-in pass/fail inspection standard.
Simultaneous Dimensional Verification: Evaluates headspace, outer diameter, rim engagement, and case length in one step, using an integrated end step/groove to indicate maximum and minimum allowable headspace limits.
Solid Steel Construction: Precision-machined from solid steel/stainless steel to deliver consistent dimensional stability across repeated bench use.
Dual-Length 9mm Acceptance: Purpose-built for 9mm Luger (9x19mm Parabellum, .355 bullet diameter) while also accepting standard 9x21mm cartridges.
Unpowered Mechanical Operation: Requires no batteries or electrical power, functioning as a fully mechanical handheld bench tool.

Specifications

Product Name: Hornady Lock-N-Load® Cartridge Gauge 9mm Luger (.355)
Manufacturer Part Number (MPN): 380701
Material: Precision-machined solid steel / stainless steel
Primary Calibre Compatibility: 9mm Luger (9x19mm Parabellum, .355 bullet diameter)
Alternate Calibre Compatibility: 9x21mm
Capacity: 1 cartridge at a time (single-station drop-in)
Measurement Standard: SAAMI chamber specifications
Power Requirements: None (mechanical hand tool)

Who is the Hornady Cartridge Gauge 9mm Luger for?

Practical and IPSC pistol shooters inspecting handloads — requires immediate pass/fail quality control against SAAMI chamber dimensions to prevent feeding jams in match firearms chambered for 9mm Luger (9x19mm, .355 bullet diameter) or 9x21mm cartridges.
Metallic cartridge handloaders verifying resized brass and completed ammunition — requires verification that resized cases and seated .355 bullet handloads conform simultaneously to proper outer case diameter, overall length, and headspace tolerances using a single-station 9mm handgun cartridge gauge.

Less suitable for: High-volume reloaders needing to inspect hundreds of rounds per session at faster batch throughput, who are better served by a 50-round or 100-round multi-hole checker block, shooters loading different calibres such as .380 ACP, .40 S&W, or .45 ACP, who require a dedicated calibre-specific gauge, or competitors using firearms with custom tight-reamed match chambers, who should gauge rounds directly in their removed match barrel.

SKU	HN42862LP
Model #	380701
Brand	Hornady
Shipping Weight	1.0000kg

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Hornady 380701 Cartridge Gauge 9mm Luger Steel

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