The RCBS 32901 is a two-die set specifically designed to reload bottleneck cases. This set comprises of a Full-Length Sizer Die equipped with an Expander-Decapping Unit, and a Seater Die that comes with a Bullet Seater Plug. By bringing the case to Saami minimum cartridge dimensions, the Full-Length Sizer Die sizes the case's exterior, de-primes it, and expands the neck for bullet acceptance.
Uniquely, this die features vents that protect the case from any potential damage that could be caused by trapped air or excessive lubricant. It carefully maintains headspace to minimal tolerances to prevent altering the case body length during full length sizing. The Seater Die included in this set encapsulates a built-in roll crimper, enabling it to securely seat the bullet while simultaneously crimping it.