L.E. Wilson .328 Steel Neck Sizer Die Bushing B-328

Description

This is the L.E. Wilson .328 diameter steel neck sizing bushing, part number B-328. It gives precision handloaders a simple way to control neck tension without leaning on a traditional expander ball. Each bushing sizes the outside of the case neck to a specific diameter, so you can fine tune how tightly the brass grips the bullet and keep that consistent round after round.

Picking the Right .328 Bushing for Your Brass

Sizing selection comes down to a quick measurement. Measure the outside neck diameter of a loaded cartridge with a caliper or micrometer, which gives you the bullet diameter plus twice the neck wall thickness. From there you want a bushing that reads about .002 to .003 inch smaller than that number. Once you factor in the natural spring-back of the brass after sizing, that leaves you roughly .001 to .002 inch of grip on the bullet. The .328 lands in the middle of the lineup, and the full range runs in .001 inch increments, so there's a size to match just about any neck.

How the Steel Neck Sizer Bushing Performs

Wilson builds these from polished and precision ground steel, which makes for smooth sizing and a long service life. Because the bushing sizes only the neck, you work the brass less than you would with an expander-based setup, and that pays off in longer case life and better concentricity. For precision rifle work and load development, that kind of repeatability is exactly what you're after.

Fit and Compatibility of the B-328 Bushing

This bushing drops into L.E. Wilson bushing-type neck sizing dies and Wilson bushing-type full length sizing dies. It also interchanges with Redding bushing-style sizing dies thanks to the shared dimensions. Keep in mind the die itself and the bushing are sold separately, so you'll want to pair this with the correct Wilson or Redding die to put it to work.