Redding Neck Sizing Bushings .337"

The Redding Neck Sizing Bushings .337" (RB76337) are precision reloading components engineered to deliver consistent neck tension across high-volume ammunition production. Manufactured by Redding Reloading Equipment, these bushings feature heat-treated steel construction with a titanium nitride surface coating that increases surface hardness while reducing friction during the sizing process. The .337" diameter fits cartridges in that specific neck range, allowing reloaders to achieve exact neck tension specifications critical for accuracy and consistent velocity.

Redding's neck sizing bushings are available across a range of diameters to accommodate calibers from .17 to .338, with the .337" bushing fitting intermediate and larger rifle cartridges. The titanium nitride treatment is more than a durability enhancement—it directly reduces the force required to size each case, extending tool life and improving the consistency of your press stroke. This matters in precision reloading, where variable sizing pressure can introduce subtle velocity variations. The heat-treated steel construction withstands repeated cycling without deformation, maintaining the exact bushing diameter across hundreds or thousands of rounds.

These bushings are designed for reloaders seeking repeatable results in competition shooting, hunting ammunition development, and high-precision rifle loads. Whether you're loading for match-grade accuracy or developing cartridge specifications for a new rifle, selecting the correct bushing diameter—in this case .337"—is essential to achieving your target neck tension. Redding's sizing bushings work in any standard reloading press with compatible bushing-style neck sizing dies, making them a straightforward upgrade for shooters already invested in Redding's reloading system.