RCBS Full-Length Die Sets are crafted from our proprietary die steel and machined to precise tolerances, ensuring exceptional quality for hand-loaders. Each set includes a Full-Length Sizing Die and Bullet Seating Die, specifically designed for reloading bottleneck cases. The Full-Length Sizer Die, featuring an Expander-Decapping Unit, sizes the case to SAAMI minimum cartridge dimensions, de-primes and expands the neck to accept the bullet. Vents in the die prevent damage from trapped air or excessive lubricant, while precise headspace tolerances ensure the case body length remains unchanged during sizing. The Seater Die includes a built-in roll crimper to secure the bullet while it's seated, delivering reliable and consistent results.