Hardened stainless steel neck bushing from L.E. Wilson with a .003” taper for precise neck sizing in .001” increments.
Bushing can be inverted for emergency sizing adjustments or fine-tuning when brass becomes too hard or to alter neck tension slightly.
Compatible exclusively with L.E. Wilson dies and not interchangeable with Forster or RCBS dies; select size by subtracting .002" to .003" from either loaded cartridge outside neck diameter or calculated neck wall thickness plus bullet diameter.