Hornady Horn 380726 Cartridge Gauge .22 ARC .224 Caliber Precision Tool

The Hornady Lock-N-Load Cartridge Gauge in .22 ARC is a precision reloading tool designed to help you verify that your handloaded ammunition and brass cases will chamber correctly in SAAMI-spec rifles. Whether you're developing loads for a new .22 ARC rifle or validating a reloading recipe you've been working up, this gauge removes guesswork from the process—catching dimension issues before you fire a round downrange.

Reloaders often discover too late that a case didn't resize properly or that a loaded round is just slightly out of spec. The .22 ARC cartridge gauge lets you test fit rounds and cases quickly at the bench, saving you from wasted components, potential firearm damage, or worse. This straightforward quality-control step is especially valuable when you're handloading a newer cartridge like the .22 ARC, where chamber tolerances matter.

Part of Hornady's Lock-N-Load system, this gauge integrates with other reloading equipment in that line and fits the way many reloaders already work. If you're serious about accuracy and safety in your reloading operation, a cartridge gauge tailored to your caliber is an inexpensive insurance policy.

Key Features

• Purpose-built for .22 ARC (.224 caliber) to verify SAAMI chamber fit
• Checks both loaded ammo and fired brass cases
• Integrates with Hornady Lock-N-Load reloading system
• Reduces failed rounds and wasted components

Specifications

Frequently Asked Questions

What exactly does a cartridge gauge check?

A cartridge gauge verifies that your loaded rounds and resized cases will fit into a SAAMI-specification chamber. You simply try to insert your ammo or brass into the gauge—if it fits, you're good; if it doesn't, your dimensions are off and you need to troubleshoot your reloading process.

Is this gauge specific to .22 ARC?

Yes. This Hornady cartridge gauge is designed specifically for .22 ARC (.224 caliber) ammunition. You'll need a different gauge for other calibers.

Can I use this gauge with other reloading brands?

This gauge is designed as part of Hornady's Lock-N-Load system. While the basic principle of a cartridge gauge is universal, compatibility with other brand equipment should be verified before purchase.

What's the difference between a cartridge gauge and a headspace tool?

A cartridge gauge checks the overall fit of a loaded round or fired case in a chamber. A headspace tool typically measures the distance from a fixed reference point (like the bolt face) to the shoulder or datum line. This Hornady tool functions as a go/no-go gauge for chambering, helping you verify that reloaded ammo will actually fit your rifle.