SERP

Measuring the overall length (OAL) of your ammunition is crucial for ensuring proper chambering and reliable firearm operation. The Hornady OAL Gauge is designed specifically for this purpose, providing accurate measurements while being simple to use. Our detailed review examines its key features and performance to help you determine if it's the right tool for your ammunition testing needs.

As an Amazon Affiliate we may earn from qualifying purchases at no cost to you.

Reviews

Fowler 54-646-401-0 Electronic Bore Gauge

This reliable bore gauge combines precise electronic measurement with practical engineering features like a flexible air hose and automatic shutoff. Its robust 1.9-quart reservoir lets you complete multiple measurement jobs before refilling, while the easy-to-read digital display shows thousandths of a millimeter accuracy. The included magnetic stand adapts to various bore sizes, making it a versatile tool for cylinder inspection and measurement.

Burndy UPG10 Inspection Gage

The Burndy UPG10 Inspection Gage combines durability with precision measurements for your reloading or firearm maintenance tasks. Built to last with a robust steel construction, this brown-coded gauge helps you get your parts measured correctly every time.

Frankford Arsenal Cartridge Overall Length Gage

This plastic gauge mounts easily to any cleaning rod with a diameter of 1/4 inch or less, making it versatile enough for all rifles. By simply comparing the distance between the two clamps with your calipers, you can quickly determine the perfect cartridge overall length for your reloads – which is exactly what it's designed to do. While some may find the $50 price point steep for what's essentially two pieces of plastic, the fact that the clamps prevent rod flexing and protect your rifle's muzzle makes it a practical tool for reloaders who want to avoid damaging their equipment.

Hornady Lock N Load Headspace Bushing .420

Made in the USA, these machined steel bushings fit into your Lock-N-Load gauge to give you precise measurements when checking your bullets and cases. They're made to last and work great with the comparator system to make sure your rifle brass is just right. Each bushing is interchangeable with the comparator, so you get a kit that's both accurate and practical for anyone serious about their shooting.

Hornady .350 Lock-N-Load Headspace Bushing

This precision-machined bushing fits the Hornady Lock-N-Load Headspace Gauge and helps ensure your rifle cartridges measure up perfectly every time you load. It's made in the USA and works with lots of different calibers - just drill and ream it to the right size for your specific need. The whole set really helps take the guesswork out of accurate reloading.

iGaging 9.5" Hornady OAL Gauge

This iGaging bore gauge combines an analog dial with precise 0.0005" resolution to measure bores from 0.7" to 6". The self-centering carbide tip reduces measurement error, while the compact 9-1/2" length fits easily into tight spaces. The included ABS storage case keeps the gauge and interchangeable contacts organized for reliable measurements every time.

Hornady 12 Gauge Cleaning Kit

The Hornady cleaning kit is a practical choice for shooters who want reliable maintenance tools without the bulk of a full-sized kit. It's designed for quick access, whether you're at the range or out hunting, with an intuitive layout that keeps everything organized. The included Boresnake and cleaning solutions make light work of maintenance, while the compact soft-sided case protects your gear and keeps it handy when you need it.

Forster 6.5 PRC No-Go Headspace Gauge

The 6.5 PRC No-Go gauge helps Hornady OAL enthusiasts ensure their cartridges meet exacting standards. It's specifically designed for 6.5 PRC cases, giving reloaders precise measurements for optimal performance and reliable chamber engagement.

Buyer's Guide

As precision measuring tools, Hornady OAL gauges require careful consideration of several key factors to ensure accurate and reliable measurements. Understanding these aspects will help you select the right gauge for your ammunition testing and reloading needs.

Caliber Compatibility

Hornady OAL gauges are available in multiple calibers to match specific bullet diameter requirements. When selecting a gauge, ensure it corresponds exactly with the caliber of your ammunition. Using the wrong gauge can lead to incorrect measurements and potential tool damage.

Material Quality and Durability

The gauge's material composition affects both its accuracy and longevity. High-quality gauges typically feature corrosion-resistant coatings and precision-machined bodies made from durable metals like brass or stainless steel. Investment in a well-constructed gauge prevents wear and maintains measurement accuracy over time.

Size and Handling Ergonomics

Physical dimensions play a crucial role in gauge usability. Comfortable grip designs with properly spaced measuring surfaces improve accuracy during use. Additionally, gauges with clear, well-defined measuring scales reduce reading errors and enhance overall user experience.

Calibration and Maintenance

Regular calibration ensures continued measurement accuracy. Most Hornady OAL gauges include detailed instructions for proper calibration procedures using standardized diameter masters. Maintaining the tool's clean, dry environment also prevents corrosion and extends its operational lifespan.

FAQ

What is an OAL gauge?

An OAL gauge, short for Overall Length gauge, is a specialized measuring tool used primarily in ammunition and firearm maintenance. It measures the total length of a cartridge from the cartridge case mouth to the base, helping ensure proper chambering and reliable operation in firearms.

Hornady's OAL gauge is designed with precise measurements and durable construction, featuring adjustable gauges for various cartridge types. This tool helps shooters verify correct cartridge length and detect cases that may cause chambering issues.

How accurate is a Hornady OAL gauge?

The Hornady OAL gauge utilizes precision-engineered adjustable gauges that can measure cartridge lengths with remarkable accuracy. Each set includes gauges specific to different length ranges, allowing for exact measurements within each category.

Users report consistent results within 0.001 inches, making the gauge suitable for both casual shooting and competitive precision requirements. The adjustable design accounts for slight variations in cartridge size, though regular calibration against a known standard is recommended for the most accurate measurements.

What makes Hornady's gauge different from others?

Hornady's OAL gauge stands out through its modular design, featuring interchangeable gauges for different cartridge lengths. This allows shooters to measure multiple types of ammunition with a single tool, reducing the need for multiple specialized gauges.

The company's gauge also includes clear, indexed markings and durable construction, with some models featuring a magnetic base for quick and easy measurement of brass casings on workbenches or reloading stations.

Can the gauge measure complete cartridges?

Yes, the Hornady OAL gauge measures complete cartridges, including both rimfire and centerfire ammunition. The adjustable gauges fit over the cartridge case mouth, measuring to the base while ensuring the primer pocket remains accessible.

This design allows for both quick visual inspection and precise measurement of cartridge length, making it ideal for both new and experienced shooters, as well as professional reloading operations.

What maintenance does the gauge require?

Regular cleaning with mild soap and water is all that's needed to maintain the accuracy of a Hornady OAL gauge. Users should avoid harsh chemicals that might damage the metal components or alter the gauge's measurements.

After cleaning, ensure the gauge dries completely before storing. For the adjustable gauges, users should periodically check the set screws to ensure they remain tight, as this affects the gauge's ability to maintain its precise measurements.

Are there different models available?

Hornady offers several OAL gauge models targeting different user needs. Their basic models include gauges for common cartridge lengths, suitable for general shooting and reloading use.

For more specialized needs, such as military or exotic cartridge measurement, Hornady offers extended-range gauges that can accommodate longer cartridges. These models also feature additional tooling to measure specific components like bullet seating depth and primer pocket depth.