RCBS .300 Win Mag Chamber/Case Length Gauge

Ensure the proper fit of your pistol ammunition with the RCBS Chamber/Cartridge Gauge. This 1-piece, non-adjustable gauge is designed to check all critical dimensions of your pistol ammo to ensure a proper fit. Simply drop a loaded round into the precision-crafted gauge if it fits, it will fit your pistol. The gauge verifies both chambering and cartridge length, giving you the peace of mind and confidence you need before heading to the range. Don't take chances with poorly fitting ammo choose the RCBS Chamber/Cartridge Gauge and shoot with confidence every time.