The Hornady .300 Remington Ultra Magnum Custom Grade Bullet Seating Die (Hornady part no. 044159) is a custom grade bullet seating die for .300 Remington Ultra Magnum brass. Made by Hornady, a longtime staple on the reloading bench of handloaders who work up their own precision ammunition. This die is machined to fit standard reloading press threads and drops straight into your existing die set for .300 Remington Ultra Magnum cases. Handloaders sizing, expanding, seating, or crimping .300 Remington Ultra Magnum brass for hunting, competition, or range practice rely on dies like this one for round-to-round consistency that factory ammunition can’t always match. It’s built for the reloading bench, not the range bag, and belongs in the toolbox of anyone loading their own .300 Remington Ultra Magnum ammunition.

Key Specifications

• .300 Remington Ultra Magnum is the cartridge this die is machined to size, expand, seat, or crimp.
• Custom Grade Bullet Seating Die function: this die seats the bullet to precise depth in the case mouth, setting the finished cartridge’s overall length for reliable feeding and repeatable accuracy.
• Precision-machined internals: a spring-loaded, self-centering seating stem lets the bullet align itself as it enters the case to help reduce runout at the bullet tip.
• 7/8-14 threaded die body drops into any standard single-stage, turret, or progressive press without an adapter.
• Precision-machined steel construction holds tight tolerances through years of repeated reloading sessions.

Frequently Asked Questions

What does this bullet seating die do? Seats the bullet to precise depth in the case mouth, setting the finished cartridge’s overall length for reliable feeding and repeatable accuracy.

Is a separate crimp step needed after seating? For most straight-wall pistol calibers, yes; run a taper crimp die afterward to remove the case-mouth flare. Bottleneck rifle brass generally relies on neck tension alone and doesn’t need a separate crimp.

Buy the Hornady .300 Remington Ultra Magnum Custom Grade Bullet Seating Die

Order the Hornady .300 Remington Ultra Magnum Custom Grade Bullet Seating Die from our Lubbock, Texas gun shop for fast, direct shipping to your reloading bench. Browse our full lineup of reloading dies to round out your press setup for .300 Remington Ultra Magnum handloads.