Hardened stainless steel neck bushing from L.E. Wilson designed in .001” increments with a .003” taper for precise sizing.
Bushing can be flipped for emergency tighter sizing or fine-tuning when brass hardens or to adjust neck tension.
Compatible with L.E. Wilson dies only, not interchangeable with Forster or RCBS dies; select bushings by subtracting .002" to .003" from either loaded cartridge neck diameter or case neck wall thickness times two plus bullet diameter.