What are these Rings?? --Update**

[hoz53]

These look like incipient rings but they are 1/2” from the body/shoulder junction. Chamber isnt to old so mabie something in there since they are on about all cases. Couldnt find it with borescope. i tried checking with a little hook in the case and also looked with borescope and didnt see anything inside the brass. Thanks

PS— oh ill look in my dies tonite to.

Update ::last two pics are one of these i just took the grinder to-- ring is at black marks--i dont see anything inside

 

[josebd]

Nothing to worry about!
more than likely it’s just your die

 

[Thud]

Marks from your box where you store you loaded rounds. Hitting the plastic walls of separation

 

[hoz53]

Marks from your box where you store you loaded rounds. Hitting the plastic walls of separation

could be ill check it out though they dont get stored in there to long thanks

 

[hoz53]

Nothing to worry about!
more than likely it’s just your die

i suspect so. thanks

 

[Mikemci]

I'd check the chamber, while you have the borescope out.

 

[JayHHI6818]

Marks from your box where you store you loaded rounds. Hitting the plastic walls of separation

I’ve had same marks and it was from ammo box. Easy to check

 

[jghoghunter]

Ammo box

 

[243winxb]

These 223 had a head clearance of .014" They came apart on firing & when fl sizing.
No harm done.

 

[AlNyhus]

Don't be too sure about that.......

 

[6.5 forever]

Marks from your box where you store you loaded rounds. Hitting the plastic walls of separation

This

 

[Ned Ludd]

My Giraud annealing machine leaves marks exactly like that as it rolls the cases during the annealing process. However, you want to be very sure the rings are nothing more than a cosmetic mark on the exterior. If it is not merely a slight surface mark on the outside, something unpleasant might be impending (i.e. case-head separation).

 

[David Christian]

These look like incipient rings but they are 1/2” from the body/shoulder junction. Chamber isnt to old so mabie something in there since they are on about all cases. Couldnt find it with borescope. i tried checking with a little hook in the case and also looked with borescope and didnt see anything inside the brass. Thanks

PS— oh ill look in my dies tonite to.

If not your ammo box, do you use a Giraud trimmer? Looks to be about the right distance from shoulder???

 

[Hal]

Die stratches go up and down.
Depending on the length of your bullet and if the point is up or down the line rubbed a case guard is usually closer to the base of the case.
Look at a new case, than fire it. That will tell you what you need to know.

Hal

 

[Rsadams]

I can tell you that I definitely would at least check them with the bent paper clip before I did anything with them... Plus I would check the chamber.... Never mess around with stuff if you are not 100% sure....

 

[Rook 6]

I agree it could be die or ammo box, one of those two possibilities. Don’t have a Giraud annealer so can’t comment. Good on you using a hook to scrape along the inside of the case. I use a piece of piano wire bent 90 degrees to a sharpened point to check cases for indications of case separation. Best old school trick in the book. Good luck determining root cause!

 

[Lefty Trigger]

I had some 6BR cases get rings like that and it ended up being from the rifles chamber. I had to buy a special chamber hone to fix the chamber to stop it from happening.

 

[Murray Brook]

I had marks such as those and they were from, rolling my rounds on the V-blocks on my RCBS case master. To be sure maybe section one case and make sure.

 

[hoz53]

Marks from your box where you store you loaded rounds. Hitting the plastic walls of separation

well i checked the box tonite and it isnt that so ill keep looking thanks

 

[hoz53]

Nothing to worry about!
more than likely it’s just your die

checked my dies tonite and i dont think it is that. ill keep looking thanks