RCBS 15503 Small Base 2-Die Set .308 Winchester Group A Reloading

The RCBS 15503 Small Base 2-Die Set delivers precision reloading for .308 Winchester cartridges with enhanced case sizing for semi-automatic firearms. This Group A die set ensures consistent chambering in tight-tolerance chambers found in military-style rifles and precision gas guns.

What Makes This Different

Small base dies resize cases to smaller dimensions than standard full-length dies, reducing case diameter by approximately 0.001-0.002 inches at the base. This tighter sizing prevents chambering issues in semi-automatic rifles with minimum-specification chambers. The hardened steel construction withstands thousands of sizing operations while maintaining dimensional consistency that standard dies cannot achieve in demanding applications.

Key Features

• Small base full-length sizing die reduces case base diameter for reliable feeding
• Seating die with built-in roll crimp for consistent bullet placement
• Heat-treated steel construction with precision-ground surfaces
• 7/8-14 thread pitch fits all standard reloading presses
• Group A classification for .308 Winchester/.243 Winchester case family
• Includes sizing die, seating die, and shell holder
• Compatible with RCBS, Lee, Hornady, and Dillon presses

This die set excels in applications requiring maximum reliability, particularly for AR-10 platforms, M1A rifles, and other semi-automatic .308 chambers. The small base sizing eliminates extraction difficulties and feeding malfunctions common with standard-sized cases. Match shooters and tactical users benefit from the consistent case preparation that supports sub-MOA accuracy potential.

Technical Specs

• Caliber: .308 Winchester
• Die type: Small base 2-die set
• Thread: 7/8-14 TPI
• Material: Heat-treated alloy steel
• Finish: Black oxide coating
• Group classification: A
• Includes: Sizing die, seating die, shell holder
• Country of origin: United States
• Manufacturer: RCBS

Reloaders working with semi-automatic .308 platforms will find this small base die set eliminates the feeding and extraction issues that plague standard full-length dies. The precision manufacturing ensures consistent results across thousands of reloading cycles.