Redding 300 Winchester Magnum Bushing Full Length Die Set

The Redding 300 Winchester Magnum Bushing Full Length Die Set is built for reloaders who demand precision and consistency with their 300 Win Mag loads. This two-die set pairs a Type S Bushing Full Sizing Die with a Competition Bullet Seating Die, giving you the control needed to produce match-grade ammunition that shoots tight groups downrange. Whether you're loading for a long-range hunting rifle or a precision competition gun, the adjustability and repeatability here let you dial in your loads to your exact specifications.

The Type S Bushing sizing die is where this set earns its reputation. Rather than forcing a one-size-fits-all approach, interchangeable bushings let you choose your own neck sizing and tension. This means you can fine-tune how much the case neck gets resized, directly controlling bullet grip and runout—critical variables that separate good loads from excellent ones. Full-length resizing ensures your rounds chamber consistently in any 300 Win Mag rifle.

Seating precision comes from the Competition Bullet Seating Die, which incorporates a micrometer adjusted in 0.001" increments and a floating seating stem. That floating stem system works to minimize bullet concentricity errors, keeping your projectiles centered in the case neck. Concentricity matters: sloppy seating can introduce runout that degrades accuracy, especially at distance. With this die, you're building ammunition with the attention to detail that competitive shooters and serious hunters expect.

Key Features

• Type S Bushing Full Sizing Die with interchangeable bushings for customizable neck tension
• Competition Bullet Seating Die with 0.001" micrometer adjustment
• Floating seating stem to reduce bullet concentricity problems
• Full-length resizing for reliable chamber fit
• Purpose-built for 300 Winchester Magnum

Specifications

Frequently Asked Questions

What bushings come with the Redding 300 Win Mag die set?

The set includes the Type S Bushing Full Sizing Die, but specific bushing sizes are not detailed in our product data. Contact us or consult Redding's sizing chart to determine which bushings match your brass and desired neck tension.

Can I use this die set to load for other calibers?

No, this die set is caliber-specific to 300 Winchester Magnum. You'll need a separate die set for other calibers.

What's the difference between this set and standard full-length dies?

The interchangeable bushings in the Type S Sizing Die give you precise control over neck sizing and tension, and the Competition Seating Die's floating stem and fine micrometer adjustment minimize concentricity errors—advantages you won't find in basic full-length die sets.

Is this set suitable for hunting and competition reloading?

Yes. The precision features make it suitable for any application where accurate, consistent 300 Win Mag ammunition matters, whether you're building for long-range hunting or competitive shooting.