Lee Factory Crimp Die, 7mm RUM

The Lee Factory Crimp Die, 7mm RUM (Lee part no. 90869) uses a collet, not a standard taper or roll crimp, to lock the bullet in place more firmly than any other crimping method. Because the collet closes evenly around the entire circumference of the bullet, it forms a crimp even on bullets with no cannelure or crimp groove, turning notoriously difficult-to-crimp 7mm RUM loads into an easy, repeatable step. That firmer hold means pressure has to build higher before the bullet starts to move, which several handloaders have found improves accuracy in addition to holding zero under recoil and through a magazine feed cycle. It is a drop-in upgrade for any 7mm RUM reloader running standard 7/8-14 threaded dies.

Key Specifications

• Sized specifically for 7mm RUM cartridges.
• Uses a collet crimp instead of a standard taper or roll crimp.
• Forms a crimp even on bullets with no cannelure or crimp groove.
• Firmer crimp requires higher pressure to start bullet movement, aiding accuracy and recoil resistance.
• Classified as a Factory Crimp Rifle Die, built for bottleneck rifle cartridges.

Frequently Asked Questions

What cartridge is this die for? The Lee Factory Crimp Die, 7mm RUM is built specifically for 7mm RUM.

Do my bullets need a crimp groove? No, the collet is powerful enough to form a crimp even on bullets that have no cannelure or crimp groove.

Buy the Lee Factory Crimp Die, 7mm RUM

Order the Lee Factory Crimp Die, 7mm RUM from our Lubbock, Texas gun shop for fast, insured shipping straight to your reloading bench. See our full other reloading equipment lineup for more calibers.