Lym Pro Die Pack 300Prc

The Lyman Pro Die Pack for .300 PRC is a complete reloading die set engineered to deliver precision and durability for long-range rifle ammunition. Built around Lyman's reputation for quality die design, this three-die set (sizing, seating, and crimping) gives you the core tools needed to reload .300 PRC cartridges on progressive, turret, or single-stage presses. Whether you're working up loads for a new precision rifle or running high-volume reloading sessions, these dies are designed to handle the job consistently.

The sizing die features a highly polished carbide ring that cuts down on sizing force and resists wear—a critical advantage when processing large quantities of cases. The spring-loaded decapping rod system ensures primers are forcefully removed from the pocket every time, reducing the risk of a stuck primer derailing your reloading session. For the .300 PRC, precise neck tension is critical to consistency, and Lyman's two-step M die neck expander gives you control over neck expansion and case mouth flare.

The micrometer-adjustable seating die puts you in command of bullet seating depth. Its floating bullet seating punch centers each bullet on the case to minimize runout—a key factor in precision shooting at distance. The taper crimp die, also micrometer-adjustable, removes case mouth flare and locks the bullet in place, improving retention and shot-to-shot consistency. All sizing, seating, and crimp dies are built from stainless steel, which resists rust and corrosion far better than conventional die materials.

This is a no-compromise die set for the reloader who respects precision and doesn't settle for mediocre brass prep or bullet seating.

Key Features

• Carbide sizing ring with polished finish for reduced sizing force and long service life
• Spring-loaded decapping rod system for reliable primer removal
• Two-step M die neck expander for controlled neck tension
• Micrometer-adjustable seating die with floating bullet seating punch to minimize runout
• Micrometer-adjustable taper crimp die for complete case mouth control
• Stainless steel construction on sizing, seating, and crimp dies for corrosion resistance
• Compatible with progressive, turret, and single-stage presses

Specifications

Frequently Asked Questions

Will this die set work in my progressive reloading press?

Yes. The Lyman Pro Die Pack for .300 PRC is designed for use in progressive presses, as well as turret and single-stage presses. Lyman engineered these dies specifically to handle the fast cycling demands of progressive reloading.

What's the difference between the Lyman M die and a standard neck expander?

Lyman's two-step M die neck expander gives you finer control over neck tension and case mouth flare. The two-step design allows you to dial in the exact amount of expansion you need for your specific brass and bullet combination, which is especially important for precision long-range loads like .300 PRC.

Why are stainless steel dies better than standard steel?

Stainless steel resists rust and corrosion, so your dies stay in like-new condition even after extended storage or exposure to moisture. Standard steel dies can develop surface rust over time, which can eventually affect their performance and appearance.

Is the seating die really adjustable for bullet seating depth?

Yes. The micrometer-adjustable seating die allows you to fine-tune bullet seating length precisely. The floating seating punch also centers the bullet on the case to reduce runout—a critical factor in long-range accuracy.