The Hornady Lock-N-Load .300 Remington SAUM Modified Case is a precision reloading tool designed specifically for use with Lock-N-Load Precision gauges. This specially prepared case ensures accurate measurements for optimal cartridge assembly.Hornady Lock-N-Load .300 Remington SAUM Modified CaseFine thread attachment for perfectly square alignment with precision gaugesCase neck made perfectly round with .002" oversized openingThreaded case-head for secure gauge attachmentAllows standard diameter bullets to slip in effortlessly and concentricallyEnsures precise alignment in your firearm's chamberEssential for serious reloaders seeking maximum precision and consistency in their .300 Remington SAUM cartridge preparation and measurement processes.