Lee Precision 7mm STW/7mm Ultra Mag Steel Factory Crimp Die - 90869

Overview

The Lee Precision Factory Crimp Die for 7mm STW and 7mm Ultra Magnum is designed to produce a uniform, factory-grade crimp for rifle ammunition. Featuring a collet-style mechanism, this die squeezes the case mouth into the bullet, providing a firm hold that is nearly impossible to buckle. By increasing start pressure, the crimp encourages a more uniform pressure curve, which can improve velocity consistency and overall accuracy. The die includes a carbide sizing insert that post-sizes the cartridge, ensuring reliable chambering. This tool is versatile enough to crimp both jacketed and lead bullets, even those lacking a traditional cannelure. Compatible with standard single-stage or progressive presses using 7/8-14 TPI threading, the die requires only a simple screw adjustment to set the desired crimp level. Note that the shellholder is sold separately.

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