Lyman Pro Carbide Trim Die 300 AAC Blackout 7/8x14

The Lyman Pro Carbide Trim Die is a precision case trimmer purpose-built for the .300 AAC Blackout cartridge. It brings fired .300 BLK brass back to a consistent, uniform length so cases can be resized and recharged with predictable neck tension and seating depth.

The die body is machined from stainless steel for corrosion resistance and long service life, and the cutting insert is carbide for heavy-duty use without wear. A bottom thread of 7/8"x14 fits all standard reloading presses, including Lyman, Mark 7, and other popular single-stage and turret presses.

A top thread of 13/16"x20 lets the die mount directly to most electric case trimmers for a powered trim-to-length workflow, so this single die covers both hand-press trimming and powered trimmer setups. For best results, Lyman recommends that cases be sized before running them into the trim die.