The Hornady Lock-N-Load 6.5x284 Winchester Modified Case is a precision-engineered reloading tool designed specifically for use with Lock-N-Load Precision gauges to ensure accurate cartridge measurements.Hornady Lock-N-Load 6.5x284 Winchester Modified CaseFine thread attachment for perfectly square alignment in firearm chamberPrecision-machined round neck with slight opening for effortless bullet insertionThreaded case-head for secure gauge attachment.002" oversized neck to accept standard diameter bulletsEnsures concentric bullet seating for maximum precisionEssential for serious reloaders seeking the most precise cartridge overall length measurements and consistent ammunition performance in 6.5x284 Winchester firearms.