L.E. Wilson B-284 .284 Steel Neck Sizer Die Bushing

Description

The L.E. Wilson B-284 is a .284 diameter hardened steel neck sizing bushing built to give you precise control over neck tension. Rather than stretching and pulling the brass with an expander ball, this bushing sizes the case neck from the outside in. That approach keeps your necks more concentric and does less to work-harden the brass, which is exactly what you want when you're chasing consistency round after round.

How the B-284 Bushing Earns Its Keep

The whole idea behind a bushing setup is matched tension. By swapping bushings, you fine-tune how tightly the neck grips the bullet, which plays a big role in seating consistency and how your groups print on paper. Picking the right size is simple math: measure the diameter of a loaded round where the bullet sits in the neck, then subtract about .002 to .003 for a good starting point. If you'd rather calculate it, multiply your neck wall thickness by two, add your bullet diameter, then subtract that same .002 to .003. Keep in mind that different brands of brass carry different wall thicknesses, so it's common for serious reloaders to keep a few bushings on hand to tune things in.

Fit and Build on the .284 Steel Bushing

This one is made from polished, precision ground steel and goes through a multi-step process to hold tight tolerances. Being a steel bushing, a light coat of case lube on the necks keeps things running smooth and reduces drag. It drops into any L.E. Wilson bushing type neck sizing die or Wilson full length bushing die, and it also plays nice with bushing dies from Redding, Hornady, and RCBS. L.E. Wilson has been a family-run shop since 1927, and that long-run reputation for precision tooling is a big part of why their bushings are a staple on so many reloading benches.

For anyone loading the 7mm family of cartridges and running a Wilson bushing die, the B-284 is a straightforward way to take ownership of your neck tension and get more reliable brass life out of every case.