
Availability: In Stock
The Redding Competition Rifle Seating Die for .300 Win Mag is a precision reloading tool built to exacting standards for handloaders who demand tight bullet seating concentricity. If you're chasing consistent accuracy across your .300 Winchester Magnum loads—whether for long-range hunting or precision rifle competition—this seating die addresses one of the most common sources of runout: inconsistent bullet-to-case alignment during the seating process.
What sets this die apart is Redding's engineering approach to the seating stem itself. The stem is precision-ground to match exact bullet diameter, and the bullet guide tolerances are so tight that the stem can actually float on an air column during operation. This extreme precision in the stem-to-guide fit eliminates the binding and misalignment that plague conventional seating dies. The cartridge case and bullet are both fully supported and aligned in a close-fitting, precision-ground sleeve before seating begins—meaning your bullet goes into the case straight, not at an angle.
The micrometer adjustment is infinitely variable (no clicks) and calibrated in .001-inch increments, giving you repeatable, precise control over seating depth. A setting feature lets you lock in your preferred depth for consistent round-to-round results. This is a die built for shooters who understand that concentricity matters: when your bullets are seated concentric to the case, velocity spreads tighten, and groups shrink.
Note: This die is not designed for compressed loads. If you run heavy powder charges that limit bullet-seating depth on magnum cases, verify your load data carefully before use.
| Caliber | .300 Winchester Magnum |
| Type | Rifle Seating Die |
| Brand | Redding |
| Micrometer Adjustment | Infinitely variable, .001" increments |
| Design | Straight-line bullet seater |
The Redding Competition die uses a precision-ground seating stem that matches exact bullet diameter, and the stem-to-guide fit is so tight it can float on an air column. The case and bullet are also fully supported and aligned in a close-fitting precision sleeve before seating, which eliminates the angled approach and binding that cause runout in conventional seating dies.
No. This die is not designed for use with compressed loads. If your .300 Win Mag loads approach maximum powder charges, verify your load data and seating depth requirements before use.
The micrometer is calibrated in .001-inch increments and is infinitely adjustable without detents or clicks, allowing you to dial in exact seating depth. A setting feature lets you lock in a reference depth for repeatable, consistent seating across all rounds.
This is a .300 Winchester Magnum seating die designed for use in standard reloading equipment; however, compatibility depends on your specific press setup. Consult your press manual or contact Redding directly if you have questions about fit with your reloader.

SKU: 167522115 • Width: 4.4in • Height: 1.85in • Depth: 5.95in • Weight: 1.05oz





Availability: In Stock
The Redding Competition Rifle Seating Die for .300 Win Mag is a precision reloading tool built to exacting standards for handloaders who demand tight bullet seating concentricity. If you're chasing consistent accuracy across your .300 Winchester Magnum loads—whether for long-range hunting or precision rifle competition—this seating die addresses one of the most common sources of runout: inconsistent bullet-to-case alignment during the seating process.
What sets this die apart is Redding's engineering approach to the seating stem itself. The stem is precision-ground to match exact bullet diameter, and the bullet guide tolerances are so tight that the stem can actually float on an air column during operation. This extreme precision in the stem-to-guide fit eliminates the binding and misalignment that plague conventional seating dies. The cartridge case and bullet are both fully supported and aligned in a close-fitting, precision-ground sleeve before seating begins—meaning your bullet goes into the case straight, not at an angle.
The micrometer adjustment is infinitely variable (no clicks) and calibrated in .001-inch increments, giving you repeatable, precise control over seating depth. A setting feature lets you lock in your preferred depth for consistent round-to-round results. This is a die built for shooters who understand that concentricity matters: when your bullets are seated concentric to the case, velocity spreads tighten, and groups shrink.
Note: This die is not designed for compressed loads. If you run heavy powder charges that limit bullet-seating depth on magnum cases, verify your load data carefully before use.
| Caliber | .300 Winchester Magnum |
| Type | Rifle Seating Die |
| Brand | Redding |
| Micrometer Adjustment | Infinitely variable, .001" increments |
| Design | Straight-line bullet seater |
The Redding Competition die uses a precision-ground seating stem that matches exact bullet diameter, and the stem-to-guide fit is so tight it can float on an air column. The case and bullet are also fully supported and aligned in a close-fitting precision sleeve before seating, which eliminates the angled approach and binding that cause runout in conventional seating dies.
No. This die is not designed for use with compressed loads. If your .300 Win Mag loads approach maximum powder charges, verify your load data and seating depth requirements before use.
The micrometer is calibrated in .001-inch increments and is infinitely adjustable without detents or clicks, allowing you to dial in exact seating depth. A setting feature lets you lock in a reference depth for repeatable, consistent seating across all rounds.
This is a .300 Winchester Magnum seating die designed for use in standard reloading equipment; however, compatibility depends on your specific press setup. Consult your press manual or contact Redding directly if you have questions about fit with your reloader.
SKU: 167522115 • Width: 4.4in • Height: 1.85in • Depth: 5.95in • Weight: 1.05oz
