RCBS 21604 3-Die Taper Crimp Die Set .450 Bushmaster

The RCBS 21604 3-Die Taper Crimp Die Set is purpose-built for reloading the .450 Bushmaster straight-wall rifle cartridge. Part of RCBS's Group C taper-crimp line, this set gives the handloader everything needed to size, expand, seat, and crimp finished rounds on a single-stage or progressive press.

The set includes three precision-machined steel dies. The full-length Sizer Die with an integrated Decapping Unit resizes the fired case and pushes out the spent primer in a single step. The Expander Die bells the case mouth to accept a new bullet, and the Seater Die seats the bullet to the desired depth and applies a taper crimp to the case mouth. Taper crimping is the standard for straight-wall rifle cases like the .450 Bushmaster, delivering reliable feeding and consistent neck tension without deforming the bullet.

As with all RCBS taper-crimp die sets, the sizer die requires case lubrication prior to resizing to prevent stuck cases. The dies are built from quality tool steel for long service life and dimensional consistency from run to run. Whether loading for hunting, range practice, or keeping a ready supply of .450 Bushmaster on hand, this 3-die set is a complete reloading solution straight out of the box.