RCBS Matchmaster Competition Seat Die for 300 Winchester MagnumRCBS Matchmaster Comp Seat Die 300 Win Mag The RCBS Matchmaster Competition Seat Die for 300 Winchester Magnum is designed for precision bullet seating in high performance reloading. Crafted with quality American manufacturing, this die features a micrometer adjustable bullet seating depth, allowing reloaders to fine tune their loads for optimal accuracy. The free floating, self centering bullet seating stem ensures consistent alignment, enhancing the