Hardened stainless steel neck bushing designed for precision resizing in .001” increments with a .003” taper for fine-tuning case neck tension.
Can be used in two orientations for standard or tighter sizing, compatible with L.E. Wilson dies but not with Forster or RCBS dies.
To select the correct bushing size, subtract .002"-.003" from the loaded cartridge's outside neck diameter or calculate based on case neck wall thickness and bullet diameter.