Hornady .366 Bushing/Caliber Insert for Match Grade Sizing Die

Hornady .366 bushing/caliber insert for match grade sizing die
Caliber insert for match grade full or neck sizing die. Made of hardened steel (identical to Redding and RCBS). Procedure for selecting the appropriate insert: Measure the neck diameter of a finished cartridge and subtract 0.002"-0.003" from that measurement (thickness of the case material). This should then yield a measurement with which a suitable bushing can be found.