Cut Marks on Neck

Shaikh

Active Member
Joined
Jan 17, 2020
Messages
33
Location
United kingdom
Hello
Experts advice needed just load my 243 once fired brass after firing no pressure signs no Hot load fired 20Rounds evrey Brass has Cut marks on Neck Help required pics attached
 

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Dmagna

Well-Known Member
LRH Team Member
Joined
May 30, 2018
Messages
758
Location
New York
Have you already resized the once fired? Or are these right out of the chamber? Trying to eliminate the die from the issue, if it your chamber have you noticed it before?
 

LoneTraveler

Well-Known Member
Joined
Feb 7, 2014
Messages
764
I would check the chamber first. From the scar on the case it looks like there is a burr at the neck, shoulder junction. When the case is fired and it conforms to the chamber, The brass is contacting a burr. When the bolt is turned on opening case is turning and the brass shaving is piled up on the right end of the scratch.
Coat the neck and shoulder of a loaded round with magic marker, load in the chamber and fire, If no mark from chamber, Time to coat a fired case and run through the die. May take a chamber or die polish to cure.
Good Luck in finding the problem then the cure.
 
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