Forster Products Neck Tension Gage Features The Forster Neck Tension Gage for .257 Cal gives reloaders a fast way to sort and screen a batch of brass before moving on to the bullet seating step. Used after case neck sizing it helps determine the optimal inside neck diameter needed for a consistent release of the bullet during firing which directly affects accuracy and consistency round to round. The gauge also serves a secondary inspection function letting reloaders check for a donut forming at the neck-shoulder junction a defect that can throw off case uniformity. Consistent neck tension is one of the most overlooked variables in precision reloading and this tool brings it under control. The gauge consists of four stepped diameters that increase in size toward the handle with each diameter etched directly onto the metal tool for easy reference. To use it the stepped end is simply inserted into the case neck until one of the diameters achieves a slip fit giving the reloader a precise reading to fine-tune case preparation. Available specifically for .257 caliber cases this tool targets a common precision reloading cartridge family. At just 0.105 lbs it is a lightweight addition to any reloading bench that doesn t take up much room in a kit. The Forster Neck Tension Gage for .257 Cal is available for sale at GrabAGun for reloaders focused on consistent neck tension. Forster Products Neck Tension Gage Specifications Manufacturer: Forster Products Type: Case Neck Gauge Caliber: .25 Caliber Weight: 0.105 lbs Available At: GrabAGun