Hornady 391928 Neck Turn Tool Mandrel 30 Cal .3055

The Hornady Neck Turn Tool Mandrel is a precision reloading accessory designed to properly align 30 Caliber cases during the neck turning process. Sized at .3055, this mandrel inserts into the case mouth and serves as the alignment pilot for the cutter, ensuring the outside of the case neck is turned concentric to the inside diameter.

Neck turning is a precision reloading step used to trim excess case neck material for uniform neck wall thickness. Consistent wall thickness contributes to more even bullet release, better concentricity, and improved downrange accuracy in precision rifle loads. The mandrel is an essential component of the Hornady Neck Turn Tool system and is the same mandrel included in the standard kit for 30 caliber case preparation.

Calibrated to a nominal .3055" diameter, this 30 Cal mandrel is sold as a single replacement or spare and is designed exclusively for use with the Hornady Neck Turner Tool.