Ensure the proper fit of your pistol ammunition with the RCBS Chamber/Cartridge Gauge. Featuring a 1-piece, non-adjustable design, this gauge checks all critical dimensions of your pistol ammo to guarantee a proper fit. Simply drop a loaded round into the precision-crafted gauge if it fits, it will fit your pistol. The gauge checks both chambering and cartridge length, offering you peace of mind and confidence before heading to the range. Don't risk using poorly fitting ammo choose the RCBS Chamber/Cartridge Gauge for reliable, accurate shooting every time.