The RCBS MatchMaster Duo die sets are the perfect sets of dies for the precision handloader looking to craft the most precise round possible. The titanium nitride coated expander offers silky-smooth case extraction and reduced brass build up on the expander both of which help reduce the amount of stretch on the case neck. Rounding out this exceptional set is the MatchMaster Competition Seating Die. What sets the MatchMaster seating die apart from the competition is the bullet seating window with bullet retaining system. Simply place the bullet in the window and raise the case into the die to seat the bullet. No more smashed fingers or misaligned bullets! Couple this with a micrometer adjustable, free-floating, self-centering bullet seating stem and you have the easiest, most accurate bullet seating die on the market.