The Redding 300 Remington Ultra Magnum 3-Die Set is a deluxe reloading die set for bottleneck cases featuring three precision dies including a full length die set with the addition of a neck (NK) sizing die.Redding 300 Remington Ultra Magnum 3-Die Deluxe SetMachined on Hardinge Super-Precision lathes for tightest industry tolerancesMade from finest alloy steels with heat treatment in atmospherically controlled furnacesGuaranteed to produce ammunition fitting any standard (SAAMI) chamberHand polished for smooth flawless functioningIndustry standard 7/8-14 threaded bodiesIncludes handy cartridge loading block storage box spare decapping pin hex wrench and shellholder storagePerfect for precision reloaders seeking lifetime durability and consistent ammunition performance for 300 Remington Ultra Magnum cartridges across any action type.