Ring of dashes around 9mm casing?

D

DonNB

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I searched the net to no avail and would really like to know what the deal is with them.

I picked these up at the range, I have maybe 50 or so of them.

Some are brass, some are nickel plated but all have the came "FC" headstamp. I have lots of others with the "FC" headstamp without the ring on them.

Some are more faint than others but they all seem to be in the same spot.

Is this normal?

Do they come from the factory like this?

Did this happen from being fired in a certain gun?

Are they safe to reload?

My apologies for the s**tty phone pics. I hope you can see what I'm talking about.

Thanks for any info!

IMG_0066.jpg

IMG_0067.jpg

IMG_0068.jpg
 
Weird. I'm not too knowledgeable in this area but it looks like some sort of crimp. Way down the case though.
 
That's done by some manufacturers to prevent bullet set-back within the case. It's factory, nothing to worry about.

I've never reloaded that style of brass, however... but I don't see that cannelure being a problem once it's been sized?

-M
 
It is called a cannelure.
It's purpose is to prevent the head from getting pushed past it deeper into the case. You can find the same cannelure on some heads. There the purpose is to crimp the end of the case into it & hold the head more securely.
 
On heads? It's there to prevent the bullet from being pushed further into the case greatly increasing pressure, esp. in 9mm and other small cases.
 
Awesome, thanks for clearing that up!

It's seriously been bugging me for a couple weeks now.

So, these are fine to reload? The cannelure doesn't change the integrity of the case or make it any weaker?

Do you guys have any idea why the manufacturer would choose to do it to some casings and not others? Like I said, I have many other casings from the same manufacture with the same headstamp that does not have a cannelure.
 
ben hunchak said:
On heads? It's there to prevent the bullet from being pushed further into the case greatly increasing pressure, esp. in 9mm and other small cases.
Click to expand...

Forgive him. English is a foreign language to him. ;)

As for the case canelure, it can eventually be a point of case wall failure, but in the normal course of things you'll lose the case before finding a split forming there.
 
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