RC BUSHING DIAMETER - 0.331

The RCBS RC Bushing Diameter 0.331 (SKU RC81646, MPN 81646) is a precision reloading component engineered for handloaders who demand exact neck sizing control. This bushing is a critical part of the RCBS bushing neck sizing system, which allows shooters to customize neck tension for specific cartridge and bullet combinations. The 0.331-inch diameter specification makes this bushing suitable for particular cartridge applications where precise neck control directly impacts ammunition consistency and firearm performance.

In reloading workflows, neck sizing bushings work within a press-mounted die to control the inner diameter of the cartridge neck with repeatable accuracy. Rather than sizing the entire case neck indiscriminately, a properly selected bushing creates uniform tension on the bullet, which reduces run-out and improves shot-to-shot consistency at the range. The 0.331-inch bushing diameter is precision-manufactured to RCBS standards, ensuring that each reloading cycle produces ammunition with minimal variation—a critical factor for shooters pursuing accuracy-critical applications like benchrest, long-range rifle work, or competitive handgun events.

This component is designed for reloaders who understand that cartridge preparation is foundational to ammunition performance. Shooters working with tight-tolerance loads, developing loads for precision rifle matches, or seeking to maximize accuracy from quality firearms will recognize the value of controlling neck tension at the component level. The RCBS bushing system is widely used across competitive shooting, long-range hunting, and precision rifle communities where ammunition uniformity directly translates to group tightness and reliability downrange.

RCBS has established a strong reputation in the reloading industry for manufacturing precision tooling that meets exacting standards. This bushing reflects that commitment to quality and is a replacement or additional component for existing RCBS bushing neck sizing die users, or for reloaders building out a complete bushing collection to handle multiple cartridge sizes and applications.