001 of brass to spring back for correct neck tension. Measure the outside neck diameter of your loaded cartridge, subtract. Proper neck bushing size can be determined two ways. By removing the neck bushing, the Full-Length sizing die can be used as a bump die to set headspace back the desired amount. The Gold Medal rifle dies are available in Full-Length and Neck sizing styles. This reduces work hardening of the case neck brass, prolonging case life and increasing accuracy. The Gold Medal sizing die features a selfcentering, changeable neck bushing that allows you to precisely set the amount of tension on the bullet. Due to variability in neck brass thickness, RCBS standard dies size the neck below your desired diameter and then pull an expander ball through to get the proper bullet tension. This changeable diameter neck bushing type of die has been used by Bench Rest and Long Range Precision shooters for years. RCBS is proud of our Gold Medal series of neck bushing rifle dies.
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