Rifle Case Marks Identify

[LoneTraveler]

The scratches are a little different on each case. May not be in actual chamber, But on its way in or out of the chamber. Coat neck and case with magic marker for better view.
1. Was the shell placed in the magazine and then move by bolt to the chamber? May be a burr on the front edge of the magazine or bottom edge of chamber.
2. When removing the case from the chamber, Hold the case with a finger till it clears the ejection port. The ejector may be shoving the case over as it is ejected and dragging the edge of the chamber or the action where the burr is located. See if you get the marks.

If the action is a Rem. 700 a burr and ejector could be the culprits, As the case drags in the chamber and action as it is withdrawn from the chamber. Been there a time or too.
Good Luck in finding the cause and a quick easy cure to the problem.

 

[elkaholic]

The scratches are a little different on each case. May not be in actual chamber, But on its way in or out of the chamber. Coat neck and case with magic marker for better view.
1. Was the shell placed in the magazine and then move by bolt to the chamber? May be a burr on the front edge of the magazine or bottom edge of chamber.
2. When removing the case from the chamber, Hold the case with a finger till it clears the ejection port. The ejector may be shoving the case over as it is ejected and dragging the edge of the chamber or the action where the burr is located. See if you get the marks.

If the action is a Rem. 700 a burr and ejector could be the culprits, As the case drags in the chamber and action as it is withdrawn from the chamber. Been there a time or too.
Good Luck in finding the cause and a quick easy cure to the problem.

That's a good point and actually more likely than what I said!

 

[CVCOBRA1]

Not sure it could be, but just to make sure it is not caused by your reloading dies, do you have any new brass that could be loaded and verified "mark free". That way the dies could be ruled out as the culprit.

 

[1of500]

Not sure it could be, but just to make sure it is not caused by your reloading dies, do you have any new brass that could be loaded and verified "mark free". That way the dies could be ruled out as the culprit.

In fact I ran a few new cases thru the sizer die today and things are looking good there

 

[1of500]

The scratches are a little different on each case. May not be in actual chamber, But on its way in or out of the chamber. Coat neck and case with magic marker for better view.
1. Was the shell placed in the magazine and then move by bolt to the chamber? May be a burr on the front edge of the magazine or bottom edge of chamber.
2. When removing the case from the chamber, Hold the case with a finger till it clears the ejection port. The ejector may be shoving the case over as it is ejected and dragging the edge of the chamber or the action where the burr is located. See if you get the marks.

If the action is a Rem. 700 a burr and ejector could be the culprits, As the case drags in the chamber and action as it is withdrawn from the chamber. Been there a time or too.
Good Luck in finding the cause and a quick easy cure to the problem.

Still working on this. I do get a rub on that neck but going to have break it down to 2 stages as you said. So hard to see, I need to pick up a Magnifying glass on the way home tomorrow. Why is it when you get older and can afford more of these things are bodies are going the other way.

 

[epoletna]

It might help you find any imperfection in the chamber (if there is one) if you could determine what part of the chamber is making the dents/scratch. Try to orient a shell in such a way you will know, after firing and extraction, where in the chamber the culprit is.

 

[skipglo]

Looks like something pretty sharp got poked down the chamber but I'm not quite connecting the dent?

Looks like there is a burr in the chamber! The scratches are as the shell is going in and the dent is from the bolt rotating the shell into the locking position and tightening into the burr

 

[skipglo]

If those 3 shells are in a particular order of top to bottom being first noticed, second and third fired...the burr is wearing down as the indent is noticeably lessening. I would try a piece of very fine Emery cloth and a wipe of the throat area. However if it's a brand new gun then I would return it without touching it!

 

[Josh P]

Not to sure a chamber burr at the location of the dent could scratch that far up on the shoulder. There may be two culprits at work here. It would be easier to diagnose if we knew the orientation of the Mark's. If they are at 6 o'clock may be a feeding issue a righthanded rifle in the 2to4 o'clock could be on extraction ding and drag. Type of rifle would be helpful. I would be surprised if it was in the actual chamber.

 

[Danny Butler]

Could it be a brush tine that came off a a cleaning brush in chamber on shoulder. I've had them flatten out and be hell to remove..

 

[Echo Charlie]

I think you have 2 distinct problems.
1 is some debris or imperfection on the chamber (more unlikely).
Try to clean it with a chamber brush or oversized bore brush and CPL.
2 looks like the expended cases scratches somewhere in the action on the way out of chamber.
Check it operating the bolt slowly with a case painted with a sharpie.
Recently had to cut a couple of spirals from the ejector spring of a new rifle. The cases strongly scratched inside the action on the extraction.

 

[HobieH3]

View attachment 130557 These are 6.5 Creedmoor Casings ran thru a bolt action with small marks on neck which turns into scratch and a ding to the right at the base of scratch. Can this be 1 or more issues here? Any help with what is going on would be greatly appreciated. Thanks

The marks on the neck look to have been made as the case moved forward across something, or as something moved rearward across the case.
The patterning is odd though, almost as if it were bouncing, or under a spring load. Is your action a controlled feed or a push feed?

 

[basinman]

Try looking at it with a bore scope. This may help identify the problem.

 

[1of500]

It's a push feed with Remington based action. Marking a case with a bullet I could not get it to mark the case like that. So I marked a case with no bullet and when opening the action, there it is. And I would think with a hot case the mark would be more. Im not sure what to do with it now but that part is easy to get to. So I'm all ears. I did turn a brush with some CLP in the chamber. Hopping to get the ding out. Get to put some rounds thru it on the weekend. Thanks for the help.