Roll crimp dies

[Drm50]

I don't like Lee products but just got the Lee Collet die for use on 223-5.56
for AR. I've loaded 223 50 yrs but for #3 and bolt actions with no crimp.
I've got several thousand 224 bullets most 55gr with no cannulure groove.
Suppose to be good die to crimp these for use in AR.

 

[Nevada Ed]

If a pistol bullet has a "Can"
and you are shooting full loads or even +P
it will help prevent bullet movement with a slight crimp, if used.

The old 9mm Speer 125 gr soft point , shown in the old Speer #8 book
shows the bullet with a cannelure , used back then.

Today most pistol bullet are smooth walled and if plated, the "Can" is very slight, at best.

One reason, a taper is used on most pistol loads, today.