Exact same scratch on every case

[LC 6.5 Shooter]

Is there a burr or something in my chamber. 6dasher. A team muller barrel. Impact action.
Never noticed it till today. Exact same scratch on every single case.

 

[spife7980]

I bet it’s where the plunger ejector pushes it against the inside of the action on a sharp edge on its way out.

 

[FuhQ]

I was fixing to say, it looks like its happening upon extraction judging by the way its jagged and long, and follows the neck/shoulder contours.

 

[OREGUN]

My impact does/did the same. Seems to be getting less dramatic as it breaks in ~1500 rounds.

 

[Tokay444]

Probably the bolt dragging on the top round in the Mag. Chamber a round and drop the mag to confirm the one on top is scratched.

 

[37L1]

IDK, check your magazine?

Probably the bolt dragging on the top round in the Mag. Chamber a round and drop the mag to confirm the one on top is scratched.

Or load one without the magazine.

 

[Buckley]

The direction of the scratch twist has me a little confused, curious. Left hand rifle?

 

[LC 6.5 Shooter]

The direction of the scratch twist has me a little confused, curious. Left hand rifle?

No right hand

 

[Ledzep]

Spife got it. You can see by the skips on the shoulder it's bouncing along the little ridges left by the reamer which get imprinted on the brass during firing... so whatever it is, is happening after firing, and the plunger ejector is going to force the case up and right as soon as it clears the breach. Most likely the top right corner of the internal lug abutment on the receiver if I had to guess. Being short little BR-based cartridges just exacerbates it, giving them (angular) room to move after clearing the chamber.

 

[Superjet]

Check the ejection port window for burrs or sharp edges. Also, run the bolt real slow and see what the cartridge hits as soon as it's free of the chamber.

 

[LC 6.5 Shooter]

Thanks everyone. I will check all these suggestions. Appreciate it.

 

[Tnc]

My impact does the same. Sharp edge in there somewhere. Not as noticeable now as it was when it was new.

 

[LC 6.5 Shooter]

My impact does the same. Sharp edge in there somewhere. Not as noticeable now as it was when it was new.

10-4. Ive got some fired brass from previous outings. Gonna see if its on them too. Ive got several hundred rounds thru the action. Never noticed it before but could be there.

 

[Supersubes]

With the upward angle of ejection, thats usually caused by the point of the upper lug abutment, and the scratch starts below the shoulder as shown on your cases. Here’s a BR case in a defiance action.

 

[LC 6.5 Shooter]

With the upward angle of ejection, thats usually caused by the point of the upper lug abutment, and the scratch starts below the shoulder as shown on your cases. Here’s a BR case in a defiance

Awesome pic. Looks like exactly what’s going on.