RCBS Steel Neck Bushings provide precise tension on bullets when used with RCBS Gold Medal Match sizing dies, improving accuracy and extending case life.
For optimal results, it is recommended to use high-quality brass with consistent neck thickness and to lubricate cases as bushings come in bare steel.
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.