The RCBS Steel Neck Bushing, .338-inch (brand part no. 81653), lets a reloader set neck tension for a specific case and bullet in RCBS dies built for it. RCBS designs these self-centering, changeable bushings for its Matchmaster and Gold Medal Match Series dies, and a full range of .001-inch sizes means the right diameter is a drop-in change. Sized correctly, the bushing reduces work hardening of the neck brass, which RCBS says prolongs case life and increases accuracy. It is made in the USA.

Key Specifications

• The bushing diameter is .338 inch, one of the .001-inch sizes in RCBS’s neck bushing range.
• It is a steel self-centering, changeable neck bushing.
• It works in RCBS Matchmaster dies.
• It also works in Gold Medal Match Series dies.
• RCBS makes it in the USA.
• RCBS’s sizing rule is to subtract .002 to .003 inch from the outside neck diameter of the loaded cartridge to choose the bushing.
• RCBS suggests keeping bushings one to two sizes above and below your target diameter.

Frequently Asked Questions

How do I choose a bushing size? RCBS gives two methods. Measure the outside neck diameter of a loaded cartridge and subtract .002 to .003 inch, or multiply the case neck wall thickness by two, add the bullet diameter and subtract .001 inch.

What kind of brass works best? RCBS says the benefits of a bushing, less work hardening of the neck brass, longer case life and better accuracy, require high-end brass with consistent neck thicknesses.

Which RCBS dies take this bushing? RCBS lists its neck bushings for Matchmaster dies and Gold Medal Match Series dies.

Buy the RCBS Steel Neck Bushing, .338-Inch

Keeping a few neighboring bushing sizes on the bench makes it easy to fine-tune neck tension for each batch of brass. Order the .338 bushing with other shellholders and die accessories from our Lubbock, Texas gun shop for fast, insured shipping.