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Hornady

HORNADY A7MMR L-N-L MODIFIED CASE 7MM REMINGTON MAGNUM

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Modified Case

For 7mm Remington Magnum

Use Hornady

Lock-N-Load Overall Length Gauge

Helps Measure

Bullet relationship to the lands

Flash Hole

Is cut out and replaced

Gauge Sold

Separately

$9.99
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SKU: A7MMR-090255704983

Overview

Designed for reloaders working with the Hornady Lock-N-Load Overall Length Gauge, this modified case helps measure bullet relationship to the lands of a barrel for 7mm Remington Magnum setups. It is intended as a dedicated accessory for load development and cartridge fit checks rather than a standalone tool. The case features a flash hole cut out and replaced by threads so it can screw into the gauge. For shooters who want to fine-tune ammunition with the proper Hornady system, it provides a straightforward, caliber-specific component.

Why Hunters Choose the Hornady

Use Hornady

Lock-N-Load Overall Length Gauge

Helps Measure

Bullet relationship to the lands

Modified 7mm

Remington Magnum case for gauge

Threads Into

Hornady Lock-N-Load Overall Length Gauge

Backed Hornady’s

Long-standing reloading equipment experience

Key Features

  • Modified case for 7mm Remington Magnum
  • Designed for use with the Hornady Lock-N-Load Overall Length Gauge
  • Helps measure bullet relationship to the lands of a barrel
  • Flash hole is cut out and replaced by threads
  • Gauge sold separately

Best Used For

  • Reloaders using a Hornady Lock-N-Load Overall Length Gauge with 7mm Remington Magnum chambers
  • Handloaders checking bullet relationship to the lands before final cartridge setup
  • Shooters who already own the separate Hornady Lock-N-Load Overall Length Gauge
  • Bench-focused users needing a modified case for 7mm Remington Magnum measurements

Specifications

CompatibilityHornady Lock-N-Load Overall Length Gauge (sold separately)
Gaugecaliber7mm Remington Magnum
Modified FeatureFlash hole cut out and replaced by threads to screw into the Hornady Lock-N-Load Overall Length Gauge
Product TypeModified Case
UseMeasure bullet relationship to the lands of a barrel

Pros

  • Designed for use with the Hornady Lock-N-Load Overall Length Gauge
  • Helps measure bullet relationship to the lands of a barrel
  • Modified 7mm Remington Magnum case for gauge compatibility
  • Threads into the Hornady Lock-N-Load Overall Length Gauge
  • Backed by Hornady’s long-standing reloading equipment experience

Considerations & Trade-offs

  • Requires the Hornady Lock-N-Load Overall Length Gauge, which is sold separately.
  • This is a modified case for measurement use, not a complete reloading component or ammunition.
  • It is specific to 7mm Remington Magnum, so it is not a universal fit for other chamberings.
  • The flash hole has been replaced by threads for gauge use, which limits it to that measurement purpose.

Suggested Comparisons

  • Reloading tools
  • Case gauges
  • Cartridge-specific reloading accessories

Suggested Accessories

  • Hornady Lock-N-Load Overall Length Gauge
  • Reloading press
  • Case gauge
  • Bullet comparator

Frequently Asked Questions

What is the Hornady A7MMR L-N-L Modified Case used for?

It is used with the Hornady Lock-N-Load Overall Length Gauge to measure the bullet relationship to the lands of a barrel.

Is the Hornady Lock-N-Load Overall Length Gauge included?

No. The product description says the gauge is sold separately.

What cartridge is this modified case made for?

It is a 7mm Remington Magnum modified case.

How is this modified case different from a standard case?

According to the product information, the flash hole has been cut out and replaced by threads so it can screw into the Hornady Lock-N-Load Overall Length Gauge.

Who makes this modified case?

Hornady.