Lee Factory Pistol Crimp Die .40 S&W/10mm

The Lee Factory Pistol Crimp Die for .40 S&W/10mm is a precision reloading tool engineered to simultaneously size and crimp pistol cartridges in a single progressive press stroke. Built by Lee Precision, a manufacturer with deep roots in the reloading community, this crimp die incorporates a carbide sizer that post-sizes your ammunition while applying a consistent roll crimp—essential for reliable chambering and consistent ignition in semi-automatic pistols firing these intermediate-power cartridges.

The dual-stage operation reduces setup time and press manipulations compared to separate sizing and crimping dies. The carbide sizing element is compatible with both .40 Smith & Wesson and 10mm Auto cartridges, allowing versatility across these ballistically similar calibers. The crimp die's profile ensures proper case mouth tension without over-crimping, which can damage case necks or cause bullet seating variation. At 0.4 lbs and compact dimensions (1.7 x 1.65 x 4.7 inches), the die integrates easily into existing reloading benches with standard progressive or single-stage presses using Lee's universal mounting system.

This tool addresses the core needs of serious handloaders who fire high volumes of .40 S&W or 10mm ammunition for duty practice, qualification, or sport shooting. Carbide dies extend the life of resizing equipment and reduce press resistance compared to steel, particularly valuable when processing large batches of once-fired brass. The Lee Factory Crimp Die approach—combining sizing and crimping—is favored by operators who prioritize consistency and repeatability across ammunition batches, where uniform case length and crimp tension directly translate to tighter shot groups and more predictable ballistics downrange.