The Redding Instant Indicator Headspace and Bullet Comparator for .223 Remington is a precision reloading tool designed to measure headspace and bullet seating depth to the lands with exceptional accuracy.Redding Instant Indicator for .223 Remington cartridgeMeasures headspace for consistent case preparationDetermines bullet seating depth to the landsPrecision measurements to 0.001" increments when used with dial indicatorCompatible with 0.375" stem diameter dial indicatorsEssential tool for precision reloading and accuracy optimizationPerfect for serious reloaders and competitive shooters who demand precise ammunition for optimal accuracy and consistency in their .223 Remington loads.