Distinctive marks on brass after shot

[dave1]

I noticed on factorys and reloads each brass has 2 distinctive marks on same location ef brass every time. obviously its something with action.opinion's on what would cause this and does it hurt eccuracy? Scratch or just the gun. 7 RUM

 

[jwp475]

Where exactly are the marks and what do they look like?

 

[dave1]

One is like a kinda dotted line similer to --- down the shoulder the other one is like a solid scratch just be4 the shoulder. i cant figure out how to post pictures

 

[jwp475]

Sounds to me like a rough chamber that needs to be polished out

 

[dave1]

Meaning rough? its a newer gun but.. that dont mean to much.. how does that go about?

 

[jwp475]

Catch a chip with the reamer when removing it and you have a scratched chamber, simple as that

 

[MagMan]

Sounds to me like the case is dragging against the back of the chamber then hitting the forward area of the action on the way out.

Without a picture we are simply guessing.

 

[AJ Peacock]

Sounds to me like the case is dragging against the back of the chamber then hitting the forward area of the action on the way out.

Without a picture we are simply guessing.

Good idea MagMan,

Dave1, if you put an empty cartridge in the chamber and then eject it, do you get a second set of marks?

AJ

 

[dave1]

ill try that and see if it makes more marks. can someone tell me where is the " upload pictures" i cant figure it out haha