Lee Precision 450 Bushmaster Rifle Precision Micrometer Bullet Seat Die

The Lee Precision 450 Bushmaster rifle precision micrometer bullet seat die gives handloaders the repeatability and control they need for consistent cartridge assembly without the premium price tag. If you're working up accurate 450 Bushmaster loads for hunting or precision shooting, this die's micrometer adjustment system and dead-length seating design let you dial in exact bullet seating depths—critical for both feeding reliability and ballistic consistency.

What sets this die apart is the floating bullet guide, which holds your case and bullet in perfect alignment during seating. The guide has radial clearance so it self-centers rather than fighting the press, meaning less bullet marking and damage, and more uniform results. The micrometer thimble and body are laser-engraved with divisions in thousandths of an inch, so you read it like a depth micrometer—no guessing, no second-guessing. And since the body contacts the shell holder, you get uniform seating depth every cycle. The bullet seating stem is machined and burnished to handle nearly any bullet point style without marring, and the floating guide is reversible, so you can flip it to seat and crimp in a single stroke if your workflow calls for it.

This die proves that precision reloading doesn't demand a high-end price. Whether you're a 450 Bushmaster hunter fine-tuning a load or a handloader who values consistency, the Lee micrometer seating die delivers the control you need at a price that makes sense.

Key Features

• Micrometer adjustment with laser-engraved divisions in thousandths of an inch for precise, repeatable seating depth
• Dead-length bullet seating with body contact on shell holder ensures uniform seating depth from round to round
• Floating bullet guide holds case and bullet in perfect alignment, minimizing bullet runout and marking
• Machined and burnished bullet seating stem seats nearly any bullet point style without damage
• Reversible floating guide allows seating and crimping in a single stroke
• Infinitely adjustable for flexibility with different bullet and case combinations

Specifications

Frequently Asked Questions

What cartridges does this seating die work with?

This die is designed for 450 Bushmaster cartridges specifically.

What types of bullets can I seat with this die?

The machined and burnished seating stem is designed to seat nearly any point style bullet without damage or marking.

Can I use this die to both seat and crimp in one step?

Yes. The floating bullet guide is reversible—simply unthread it and reinstall it flipped to allow seating and crimping simultaneously in a single stroke.

How do I adjust the seating depth?

The precision micrometer thimble features laser-engraved divisions representing one thousandth of an inch each, so you adjust and read it like a standard depth micrometer. The die is infinitely adjustable to accommodate different bullet and case combinations.