• Burstfire Neck Tension Case Mouth Gauges
  • Burstfire Neck Tension Case Mouth Gauges
  • Burstfire Neck Tension Case Mouth Gauges
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Burstfire

Burstfire Neck Tension Case Mouth Gauges

Burstfire Neck Tension Case Mouth Gauges

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The Burstfire Neck Tension Case Mouth Gauge is an essential precision tool engineered to accurately measure internal case neck tension on brass cases. Designed with a 5-step stepped diameter system in 0.001-inch increments, it allows handloaders to verify consistent neck tension and inside neck diameters to optimize projectile seating and accuracy.

Constructed from durable stainless steel, this case prep gauge provides reliable, long-lasting performance for precision handloading. It helps reloaders prevent excessive or insufficient tension across resized brass to ensure maximum consistency and shooting performance.

Key Features

Brand Burstfire
Product Type Neck Tension Gauge
Material Stainless Steel
Package Dimensions 4 x 3 x 0.25 in
Package Weight 5.6 oz
Increments 0.001 in
Step Configuration 5 Stepped Diameters

Highlights

  • Accurately measures the amount of tension inside the neck of brass cases, ensuring consistent and precise neck tension for projectile seating.
  • Neck tension gauges allow for the measurement of the inside diameter of case necks to avoid excessive or insufficient tension, which can affect the accuracy and performance of ammunition.
  • The neck tension gauge is a 5-stepped diameter metal tool. Insert the tool into the neck of the sized case and slide it until one of the diameters fits snugly. The notches indicate neck tension from 0.001 to 0.005.
  • The design provides a method for reloaders to monitor accuracy and consistency in ammunition.
  • The 5-step gauge measures in 0.001 increments starting at 0.001 below projectile dimension. For example, a .224 dimension starts at .223 at the bottom and goes up to .219. For precision loading, a 0.001 neck tension is typically sought, where the case stops at the first notch from the bottom. If it bottoms out, there may be insufficient neck tension; if it cannot be inserted to the top notch (0.219), there may be excessive neck tension.

Materials & care

Constructed from stainless steel. Keep clean and lightly oiled to prevent oxidation and maintain measurement accuracy.

Compatibility

Designed for brass cartridge cases in compatible bore sizes including .224, .243, .264, .277, .284, .308, and .338.

How to use

Insert the gauge into the neck of a sized brass case and gently slide it inward until one of the stepped diameters fits snugly. Check which notch the case stops on to read your neck tension from 0.001 in to 0.005 in.

Frequently asked questions

How does the stepped measurement system work on the gauge?

The tool features 5 stepped diameters in 0.001-inch increments starting at 0.001 inches below the projectile dimension. Stopping at the first notch indicates 0.001 inches of neck tension, the second notch indicates 0.002 inches, and it measures up to 0.005 inches.

What material is the neck tension gauge made from?

The gauge is made from rugged stainless steel designed for durability and precision.

Why is measuring case neck tension important in reloading?

Measuring internal neck diameter helps prevent excessive or insufficient neck tension, ensuring consistent projectile seating and improved ammunition accuracy.

What does it mean if the gauge bottoms out or cannot insert into the case?

If the gauge bottoms out completely, the case likely has insufficient neck tension. If the top step cannot be inserted, there is more than 0.005 inches of neck tension, indicating excessive tension.

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