Lyman's 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 and 308 Winchester 3 die sets and 450 Bushmaster 458 SOCOM 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