The Hornady Lock-N-Load 8x57mm Mauser Modified Case is specially engineered for use with Lock-N-Load Precision gauges to ensure accurate reloading measurements and precise chamber alignment.Hornady Lock-N-Load 8x57mm Mauser Modified CaseSpecial fine thread design for secure gauge attachmentPerfectly square alignment in firearm chamberRound slightly opened neck for effortless bullet insertionConcentric bullet placement for maximum precisionSKU: A8X57 UPC: 090255704273Essential for serious reloaders seeking precise cartridge overall length measurements and optimal bullet seating depth for 8x57mm Mauser rifles.