The Hornady .223 WSSM Modified Case is specially designed to work with Lock-N-Load Precision gauges for accurate reloading measurements and chamber alignment in your firearm.Hornady .223 WSSM Modified CaseFine thread attachment for Lock-N-Load Precision gaugesPerfectly square alignment for precise chamber measurement0.002" oversized neck accepts standard diameter bulletsPerfectly round neck opening for effortless concentric bullet insertionThreaded case-head design ensures secure gauge attachmentEssential for precision reloaders who demand accurate measurements and consistent results when developing loads for .223 WSSM cartridges.