Precision inspection tool for reloaders to measure inside neck diameter and optimize bullet seating tension. Four stepped gauges help identify optimal neck sizing for consistent ammunition performance.
The Forster Neck Tension Gage is an essential quality control tool for serious reloaders who demand precision and consistency. This inspection instrument allows you to measure the inside diameter of your case necks after sizing, ensuring optimal bullet seating tension before you seat a single projectile.
The gage features four stepped diameters that increase progressively in size, each 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. This slip fit tells you exactly what your inside neck diameter is—the critical measurement for consistent bullet release.
Proper neck tension is fundamental to ammunition reliability and accuracy. By knowing your actual inside neck diameter, you can adjust your sizing dies or neck-sizing approach to achieve the tension that works best for your rifle and bullets. This tool eliminates guesswork and puts you in control of your reloading process.