Magnum precision requires magnum tools
The 300WM Match Grade Shellholder Kit from Derraco Engineering is specifically designed for reloaders working with magnum calibers. This set of six CNC-manufactured shellholders provides the precision needed to perfectly accommodate the larger case heads of the .300 Winchester Magnum family during the reloading process.
Robust construction for magnum forces
Manufactured from 420 stainless steel and hardened to 45-50 HRC, these shellholders are built to withstand the higher forces associated with resizing magnum cases. The CNC machining ensures that each shellholder falls exactly within specifications, which is crucial when working with these powerful calibers where every millimeter of difference affects safety and performance.
Optimal headspace control for magnum calibers
With magnum calibers, correct headspace is even more critical than with standard calibers. The six different shellholders in this set offer incremental differences of 0.002" allowing you to determine the exact shoulder bump that fits perfectly with your specific chamber. This is essential for maintaining brass integrity over multiple reloading cycles, which is an important cost consideration with the more expensive magnum cases.
Suitable for a wide range of magnum calibers
This shellholder set is designed for the .300 Winchester Magnum family, meaning it is also suitable for calibers such as 7mm Remington Magnum, .338 Winchester Magnum, 6.5 PRC, .300 WSM, 7mm SAUM, .264 Winchester Magnum and many other calibers that share the same belt diameter and rim specifications. This makes it a versatile investment for reloaders working with multiple magnum calibers.
Practical application for long-range shooting
Magnum calibers are often chosen for ultra-long range precision shooting where extreme consistency is required. With this shellholder set, you can systematically determine the optimal configuration for your specific rifle and ammunition combination. By testing different shellholders and measuring the results with your headspace gauge, you find the perfect setting that is both safe and delivers maximum precision.
Reduced brass flow and longer lifespan
One of the major challenges when reloading magnum calibers is brass flow, where the brass begins to flow with excessive working and the cases become too short. By accurately controlling headspace with these shellholders, you minimize unnecessary working and maximize the number of times you can reload your magnum cases.
Specifications
- Material: 420 stainless steel
- Hardness: 45-50 HRC
- Number of pieces: 6
- Increments: 0.002" steps
- Suitable for: .300 Winchester Magnum family (7mm RM, .338 WM, 6.5 PRC, .300 WSM, 7mm SAUM, etc.)
- Manufacturing: CNC turned and milled
- Finish: Hardened steel
- Shellholder number: #6 compatible
Compatibility
These shellholders fit all common reloading presses from brands such as RCBS, Hornady, Lee, Redding and Forster. They are ideal for use in combination with full length sizing dies, body dies or bushing dies when striving for the highest possible ammunition quality for competition or hunting.
For serious long-range shooters working with magnum calibers, this Match Grade Shellholder Kit is an essential part of the toolbox. The ability to control headspace to within 0.05mm accuracy translates directly into better consistency at distance and more confidence in your ammunition.
