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RCBS Steel Neck Bushings are designed to offer the reloader the flexibility of selecting a bushing that provides the precise amount of tension required on the bullet when using RCBS Gold Medal Match sizing dies. This is particularly important in order to minimize work hardening of the case neck brass, thus prolonging case life and enhancing accuracy. The self-centering feature of these bushings ensures that the case neck is correctly aligned. To optimize accuracy, it is recommended to use high-end brass with consistent neck thicknesses. The steel neck bushings come in the bare steel ("in-the-white") format, so traditional case lubrication is necessary. It is important to note that these are exclusively designed for use with RCBS Gold Medal sizing dies.

For optimal results, RCBS recommends having neck bushings that are one to two sizes above and below the target diameter. These steel neck bushings are an essential component for reloading extremely consistent-shooting ammo with the Gold Medal Match sizing dies.

Brownells Gun Tech™ Tip advises that there are two ways to select the steel neck bushings required - you can either measure the outside neck diameter of your loaded cartridge and subtract .002" to .003", allowing approximately .001" of brass to spring back for correct neck tension, or measure the neck wall thickness of your case, multiply by two, add the diameter of your bullet, and subtract .002" to .003".