Hornady Horn A22a LNL 22 ARC Modified A Case - Precision Reloading Tool for Accurate Shooting

The Hornady Lock-N-Load O.A.L. Gauge Modified Case for 22 ARC is a precision reloading accessory designed to work with Hornady's LNL O.A.L. Gauge system. If you're serious about handloading ammunition that feeds reliably and shoots accurately, proper overall length measurement is non-negotiable—and this modified case is the key to getting it right. Unlike generic case simulators, this is an actual, specially prepared cartridge case that lets you measure true cartridge length with the exact bullet you plan to load.

The 22 ARC modified case comes threaded at the case head, ready to screw directly onto your O.A.L. Gauge. The critical detail: the neck is oversized by .002", which means it will safely accept the same bullets you're loading without forcing or damaging them. That matters because measuring with your actual bullet—not some arbitrary dummy shape—is what delivers accuracy to .001". Every variable that affects how your round chambers and feeds is accounted for when you measure this way.

This is a consumable component for the Hornady LNL O.A.L. Gauge system (sold separately). It's a straightforward tool for reloaders who refuse to guess on overall length, whether you're loading for target work, hunting, or competition shooting.

Key Features

• Thread-on design for direct attachment to Hornady Lock-N-Load O.A.L. Gauge
• Precision-prepared .002" oversized neck accepts standard 22 ARC bullets
• Enables measurement accuracy to .001", critical for reliable chambering and feeding
• Chambered specifically for 22 ARC; not interchangeable with other cartridges
• Purpose-built for handloading consistency and ammunition performance

Specifications

Frequently Asked Questions

Do I need a separate O.A.L. Gauge to use this modified case?

Yes. This modified case is a component for the Hornady Lock-N-Load O.A.L. Gauge system, which is sold separately. The gauge body, rod, and this case work together.

Will this modified case work with bullets from different manufacturers?

The case's .002" oversized neck is designed to accept standard 22 ARC bullets. As long as you're measuring with the actual bullet profile and weight you plan to load, it will work with any compatible 22 ARC bullet.

Is this case reusable or consumable?

This is a precision-prepared component. Like any handloading tool, it should be cared for and inspected for damage, but it is designed to serve repeatedly as part of your O.A.L. Gauge system.

Why does the .002" oversized neck matter?

The neck must accept your bullet without force to avoid damaging the bullet or case and to ensure true measurement. The .002" clearance allows your actual loading bullet to fit safely, so your O.A.L. reading reflects the exact overall length of a round ready to chamber in your rifle.