Lymans MSR Die Sets are the only die sets engineered specifically for MSR ammo and are a must for anyone reloading for a modern sporting rifle. Ammo Checker cartridge Go gauge included with each set Available in 223/5.56, 6.8 Rem. SPC, 300 AAC Blackout, 224 Valkyrie, and 308 Winchester 3 die sets and 450 Bushmaster, 458 SOCOM, 9mm, 350 Legend, and 50 Beowulf 4 die sets Small Base Size die for smooth chambering Separate Taper Crimp die for tight bullet grip Packed in a sturdy, clear cover storage case Black finish matches your favorite black rifle.