Lee Case Length Gage and Shell Holder .357 Mag

The Lee Case Length Gage and Shell Holder .357 Mag (SKU LEE90158) is an essential precision reloading tool designed for handloaders and ammunition manufacturers who demand accuracy and consistency. Whether you're a law enforcement armorer standardizing duty ammunition or a competitive shooter optimizing reload specifications, this case length gage ensures every round meets SAAMI specifications before it reaches the chamber. Case length variance is one of the most common causes of pressure inconsistency and feeding failures—this tool eliminates that variable.

Engineered from hardened steel and precision-machined to match SAAMI maximum and minimum case dimensions for .357 Magnum, this gage provides go/no-go confirmation in seconds. The included shell holder grips cases securely during measurement, preventing misalignment that could skew results. Lee Precision's reputation for tight tolerances means the gage itself will remain accurate across thousands of rounds—hardened steel resists wear from repeated case insertion better than softer materials. The compact 3.7 x 0.5 x 4.95-inch footprint fits cleanly on any reloading bench without consuming valuable workspace.

This tool is indispensable for anyone running a serious reloading operation—military/law enforcement ammunition technicians, precision handloaders, and high-volume commercial operations all depend on case length verification to prevent out-of-spec ammunition from reaching shooters. The .357 Magnum specification accommodates both standard and magnum brass, making it compatible with revolvers and lever-action rifles chambered in this popular cartridge. At just 0.06 lbs, it integrates easily into existing bench setups alongside presses, trimmers, and chronographs for a complete QA workflow.