Hardened stainless steel neck bushing from L.E. Wilson, with .310" diameter, is made in .001” increments and has a .003” taper for precise sizing.
Bushing can be flipped for emergency tighter sizing if brass hardens or for fine-tuning neck tension without stepping down to a smaller size.
Compatible exclusively with L.E. Wilson dies and not interchangeable with Forster or RCBS dies; select bushing size based on cartridge measurements or case neck wall thickness plus bullet diameter.