Can you reload factory crimped 9mm brass?

[azrocks]

Not taper crimped, but the crimp some factory rounds put behind the bullet to prevent set-back? I've been pulling these out of the brass I collect and setting them aside. Some have a series of small 'dashes' (for lack of a better description) that comprise the crimp, others a pronounced indentation that circumscribes the case.

Also, are dies available to put this kind of a crimp on your own ammo, and if so, are they recommended?

If it's not clear what I'm talking about I can provide pics.

Go easy on me: I'm new

 

[someguy2800]

doesn't bother anything. I throw them out sometimes just because I don't like the way they look but I've reloaded hundreds of them. I really don't see that it serves any real purpose.

 

[.308 Norma]

I'm with someguy2800. Except I seldom throw straight walled handgun cases out until their mouths split from too many loadings - I don't mind how they look.

 

[hdwhit]

azrocks wrote:
Can you reload factory crimped 9mm brass?

Yes.

I do it regularly. I have not had any problem with it. I do try to make sure the bullet is seated at or above the "crimp" on the case so as to avoid additional cold working of the case in the area of the "crimp".

 

[Walkalong]

That is a cannelure they put on the case under the base of the bullet to stop it from going deeper. The first firing irons out some to most of it, etc, etc.

I haven't seen any in 9MM, so I don't know how deep it is, nor how much it will iron out on the first firing.

But yes, they are OK to reload.

 

[ReloaderFred]

Some 9x19 cases contain a cannelure, especially some of the duty rounds intended for law enforcement use. It's to help prevent bullet setback, and works to a certain degree, but the constant loading and unloading of the same cartridge in the chamber should be avoided. The bullet striking the feed ramp of a semi-auto pistol pushes it back, which is called bullet setback. This can, and does, result in higher pressures when the volume of the case is reduced and the round is fired.

There are other uses for cannelures, such as designating rounds used for special purposes. On those cases, the cannelure is sometimes placed just above the web of the case. I've seen them in both .223 and .38 Special cases marked like this. Some cases also have two or more cannelures applied.

And yes, several companies make cannelure tools, but you don't need one.

Hope this helps.

Fred

 

[azrocks]

Many thanks, folks! I appreciate the edumacation

 

[ReloaderFred]

Here's what the C-H Cannelure Tool looks like:



I use it for adding the cannelure to bullets that I swage, and I've also got the Corbin Cannelure Tool, which is a slightly different design, but does the same thing.

Hope this helps.

Fred