The Hornady Lock-N-Load .222 Remington Modified Case is specially engineered for precision reloading with Lock-N-Load OAL gauges. Features a fine threaded case-head and .002" oversized neck for accurate bullet seating depth measurements.Hornady Lock-N-Load .222 Remington Modified CaseThreaded case-head for secure attachment to OAL gauge modelsOversized neck (.002") accepts standard diameter bulletsPerfectly round neck ensures concentric bullet placementBuilt to SAAMI specifications for accuracyPrecision measurements accurate to .001"Essential tool for precision reloaders who demand consistent cartridge overall length measurements. Compatible with Hornady Lock-N-Load OAL gauges for determining optimal bullet seating depth in .222 Remington firearms.