Mighty Armory TNT GOLD MATCH Die will size your rounds to spec saami with the correct bullet tension. You can load to powder data spec and expect proper case pressures, cleaner burning powder, better accuracy and your brass will last longer for more reloads. Chronographs will prove SDs will be single digits. Now you can load your rounds to spec with every lever pull. Set your flare/bell to .347-.348 inside case diameter. Taper Crimp to .376-.378 depending on the bullet diameter you are loading.