RCBS .257 Roberts Full Length Die Set

The RCBS .257 Roberts Full Length Die Set is a precision rifle reloading die set designed for reloaders producing reliable .257 Roberts ammunition for bolt-action hunting rifles and classic Mauser-based sporting rifle platforms. Full length resizing restores .257 Roberts brass to proper case dimensions while resetting the shoulder and expanding the neck, ensuring smooth chambering, consistent headspace control, and dependable performance when loading hunting and field rifle cartridges.

Quick Highlights:

• Product Type: Rifle Reloading Die Set
• Caliber: .257 Roberts
• Die Configuration: Full Length Sizing Die / Bullet Seating Die
• Press Compatibility: Standard 7/8″-14 Reloading Presses
• Material: Precision Machined Hardened Steel
• Application: Rifle cartridge reloading and ammunition production

Use Cases & Applications:

• Reloading ammunition for .257 Roberts bolt-action hunting rifles
• Producing big game and varmint hunting ammunition
• Reloading once-fired or mixed .257 Roberts brass
• Developing precision hunting handloads for sporting rifles
• Producing consistent cartridges for classic Mauser-based rifles

Design & Functional Advantages:

• Full length sizing die restores case body dimensions and resets shoulder position for reliable chambering
• Integrated expander-decapping assembly removes spent primers and expands the neck for proper bullet seating
• Precision seating die allows controlled bullet seating depth for consistent cartridge overall length
• Hardened steel construction provides durability and repeatable sizing performance
• Compatible with standard single-stage and progressive reloading presses

Technical Details:

Manufacturer: RCBS
Product Type: Rifle Reloading Die Set
Caliber: .257 Roberts
Die Configuration: Full Length Sizing / Bullet Seating
Thread Size: 7/8″-14
Material: Hardened Steel
Press Compatibility: Standard Reloading Presses
Shell Holder Included: No