Lee Precision’s Factory Crimp Rifle Die for .356-358 Winchester (Model 90904) is engineered to deliver the crimping performance of factory ammunition. This factory crimp die crimps your bullets in place the same as factory ammo, with a collet that gently but firmly squeezes the very end of the case into the crimping groove. Constructed from steel, this die combines durability with precision engineering for serious reloaders.
The Lee 356 Winchester/358 Winchester Factory Crimp Die crimps the bullet in place more firmly than any other tool. Tests demonstrate that even bullets which have no crimp groove will shoot more accurately. A firm crimp improves accuracy because pressure must build to a higher level before the bullet begins to move, with this higher start pressure ensuring a more uniform pressure curve and less velocity variation. Whether you’re handloading for hunting or precision shooting, this die ensures consistent crimping that tightens the connection between bullet and case for reliable performance across diverse conditions.
