Hardened stainless steel L.E. Wilson neck bushing sized at .285" features a .003” taper for precise case neck sizing.
Bushing can be inverted for emergency resizing or fine-tuning, with non-interchangeability with Forster or RCBS dies.
Neck bushing size selection can be done by subtracting .002"-.003" from the loaded cartridge's outside neck diameter or from calculated neck thickness and bullet diameter.