Lee Taper Crimp Die .40sw & - 10mm Acp

The Lee Taper Crimp Die for .40 S&W and 10mm ACP is a precision reloading component designed for shooters and ammunition manufacturers who demand consistency and reliability in their handloaded rounds. This specialized die serves the critical function of applying a proper taper crimp to pistol cartridges, ensuring reliable feeding, extraction, and chamber fit across semi-automatic platforms. Whether you're a competitive shooter, law enforcement armorer, or dedicated reloader, this die is essential for producing match-grade ammunition that performs flawlessly in duty or competition environments.

Unlike roll crimp dies used for revolver ammunition, the Lee Taper Crimp Die applies a controlled, gradual taper to the cartridge case neck, which is the correct specification for semi-automatic pistol rounds. This design prevents case bulging, reduces chambering resistance, and promotes consistent bullet seating depth—all factors that directly impact accuracy and reliability. The die features Lee's renowned precision engineering and is manufactured to exacting tolerances, ensuring that each reloaded round meets SAAMI specifications for both .40 S&W and 10mm ACP cartridges. The compact, durable construction weighs just 0.22 lbs and measures 1.65 x 1.6 x 4.8 inches, making it a practical addition to any progressive or single-stage press setup.

This die is ideal for reloaders working with both .40 S&W and 10mm ACP in a single tool, eliminating the need for separate dies and reducing tooling costs. Law enforcement armorers appreciate the dual-caliber capability for maintaining ammunition inventories, while precision shooters benefit from the consistent crimp geometry that supports tight velocity spreads and group consistency. Installation is straightforward on any standard reloading press with 7/8-14 TPI threads, and the die integrates seamlessly into established loading sequences. For anyone serious about ammunition quality control, this Lee component represents a proven, cost-effective solution that has earned trust across military, law enforcement, and civilian shooting communities.