Hardened stainless steel neck bushing by L.E. Wilson with a .244" diameter is designed for precise neck sizing in .001” increments and features a .003” taper.
The bushing can be flipped for a tighter fit in emergency situations or for fine-tuning, but is not compatible with Forster or RCBS dies.
To select the correct bushing size, subtract .002"-.003" from the loaded cartridge's outside neck diameter or calculate using case neck wall thickness and bullet diameter.