The RCBS 0.337in Steel Neck Sizing Bushing (RCBS part no. 81652) is an interchangeable bushing built for RCBS bushing-style neck sizing dies, letting handloaders dial in precise neck tension on their brass. Made from hardened steel by RCBS, this bushing sizes the case neck down to a 0.337-inch outside diameter, giving reloaders fine control over bullet grip without over-working brass the way a fixed-diameter full-length die can. Because these bushings are interchangeable within a bushing die body, handloaders can keep a range of sizes on hand and choose the exact one that produces the best accuracy for a given rifle and load combination. It’s a precision accessory favored by competitive and long-range shooters fine-tuning their handloads.

Key Specifications

• Bushing diameter is 0.337 inches.
• Material is hardened steel.
• Used in RCBS bushing-style neck sizing dies.
• Manufactured by RCBS.
• Lets handloaders fine-tune neck tension for accuracy.

Frequently Asked Questions

What does a neck sizing bushing do?
It sizes the case neck to a specific outside diameter, giving precise control over bullet neck tension.

How do I pick the right bushing diameter?
Bushing diameter is typically chosen based on loaded round neck diameter minus the desired neck tension, often around 0.001-0.003 inches.

Buy the RCBS 0.337in Steel Neck Sizing Bushing

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