Marks on 9mm cases

[Cmax Arms]

When resizing brass today I found these. Are they ok to reload and what causes the marks? They look like cannelure marks.
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Thanks Cmax

 

[RamRoddoc]

Yep some ammo manufacturers put them on there. I never really thought too much about them or even why they are there....

Reload away.

 

[righter13]

I had some Corbon 9mm +p that had the same marks.

 

[Cobalt 60]

Yep some ammo manufacturers put them on there. I never really thought too much about them or even why they are there....

Reload away.

If he has done it, it is safe to do. Probably reloaded more ammo than you and I have shot together in our lifetimes.

 

[Springfield 1911]

Yep some ammo manufacturers put them on there. I never really thought too much about them or even why they are there....

Reload away.

This. From what I understand they are bullet cannelures. I have shot a pile of Remington pistol brass with these marks and have not had any issues.

 

[Beerman]

Load em and shoot em. Nothing wrong with them at all.

 

[Cmax Arms]

Ok, thanks for the response.....Cmax

 

[1006]

I think that groove is there in order to create a ridge on the inside that will prevent the bullet from being pushed deeper into the case; when a semi-auto gun takes the bullet from the mag to the chamber the bullet is slammed face first into the barrel ramp and could be jammed down into the case.

 

[handloader]

Choot em