Lee Precision Primer Pocket Gauge Set Features The Lee Primer Pocket Gauge Set is a simple inspection tool that helps reloaders verify brass meets the demanding SAAMI specifications for primer pocket dimensions before loading. The go plug gauge is inserted directly into the primer pocket and if it does not enter cleanly the case likely has a military crimp that needs to be removed before reloading can proceed safely. Lee recommends pairing this gauge with a Lee Ram Swage or Lee APP Swage to complete the crimp removal process on affected brass. Checking pockets before loading helps prevent seating issues and inconsistent primer ignition down the line. If the go gauge fits the pocket loosely reversing the tool to check with the no-go end identifies pockets that have become oversized through repeated firings. A primer pocket that allows the no-go gauge to reach the bottom is oversized and may not reliably retain a primer signaling that the case should be set aside or discarded. Including both small and large gauges in one set means handloaders working across multiple cartridge types do not need separate tools. The Lee Primer Pocket Gauge Set is an inexpensive practical quality-control tool for any reloading bench available for sale at GrabAGun. Lee Precision Primer Pocket Gauge Set Specifications Manufacturer: Lee Precision Type: Case Gauge Count: 2 Available At: GrabAGun