For use with RCBS gold medal match series dies. Works in both the full length and neck sizing styles.

Neck bushing size (RCBS instructions):

• Proper neck bushing size can be determined two ways
• Measure the outside neck diameter of your loaded cartridge, subtract .002" to .003" - this allows approximately .001" of brass spring back for correct neck tension
• The other is to measure the neck wall thickness of your case, multiply by two, add the diameter of your bullet and subtract .001"
• RCBS suggests that you have neck bushings one to two sizes above and below your target diameter

Notes:

• Redding, Wilson and Hornady bushings may also be used in RCBS Gold Medal bushing dies.