The Competition Pro Series Die Sets for Traditional Cartridges feature a Competition Seater, a Redding heat-treated Steel Sizing Die, and a Profile Crimp Die. No Expander die is included, as most popular progressive machines expand the case mouth at the powder metering station. The seater stem in these dies is spring loaded and allowed to move well down into the die chamber for early bullet contact. Spring tension is maintained as the bullet and cartridge move up into the die chamber and seating begins. These features assure the straightest possible bullet alignment which provides better accuracy. Competition Straight Wall Seaters also featur Reddings 0.001" adjustable seater micrometer which is infinitely adjustable and has a "zero" set feature. These seaters are designed to fit all of the progressive presses popular toady, and will fit any 7/8"-14 single stage press.
Sinclair, Issue:4B, Page:043