Precision inspection tool for reloaders to measure case neck inside diameter and optimize bullet seating tension. Four stepped gauges help detect defects and ensure consistent ammunition performance.
The Forster Neck Tension Gage is a straightforward but invaluable tool for any reloader serious about ammunition consistency. This inspection gauge allows you to measure the inside diameter of your case necks after sizing and before bullet seating—a critical step often overlooked by casual reloaders.
The tool features four stepped diameters that increase progressively in size. Each step is clearly etched with its measurement. Simply insert the stepped end into your sized case neck and slide it in until one diameter achieves a slip fit. That measurement tells you exactly what's happening inside your case neck.
Consistent Neck Tension — Uniform neck tension is fundamental to consistent bullet release and, consequently, consistent velocity and accuracy. This gauge gives you the data you need to fine-tune your case preparation.
Defect Detection — The tool helps you identify "donuts"—the unwanted buildup of brass at the neck-shoulder junction that can cause inconsistent seating and unpredictable performance.
Batch Screening — Use the gage to quickly sort a batch of brass before your bullet seating operation, ensuring only properly prepared cases move forward.
Available in five calibers to match your reloading needs. The durable metal construction and clear etching ensure years of reliable use.
This is precision reloading made practical—the kind of attention to detail that separates good ammunition from great ammunition.