Fired brass question fired 338 Lapua

[GRASSHOPPER.1]

 

[GIXXER2000]

Need to know what it's fire from, Gas, bolt??

 

[GRASSHOPPER.1]

Fired from my Savage bolt action 338 Lapua was using US869 as I've ran out Retumbo, started low poor accuracy working the load up noticed this small dent in all fired cases,found couple of my Retumbo loads I had stashed fired them with not one showing this dent after being fired
Kinda curious why this happened all brass was processed the same time

 

[GRASSHOPPER.1]

Need to know what it's fire from, Gas, bolt??

Sorry first post couldn't figure out how to post reply with photo

 

[Bandit320]

It looks like you’re using to much case lube while resizing.

 

[GRASSHOPPER.1]

Rifle

 

[GRASSHOPPER.1]

It looks like you’re using to much case lube while resizing.

This was post firing this is happening in the chamber

 

[Mike Casselton]

^^^^ It does look like that.

If that dent is showing up immediately after firing, then it could be caused by too low of a powder charge.
Charge doesn't create enough pressure to move the shoulder fully forward and the neck can't expand to seal the chamber. Gas goes down the neck and causes dents on the shoulder.


HOWEVER, that case is awfully clean for that to have happened.

It looks much more like too much lube and a shoulder dent because the die couldn't vent out the lube.

 

[GRASSHOPPER.1]

I read that could be cause by low pressure just figured I get second opinion
It has been cleaned resized the dent was post sized,I'm gonna up the charge still trying to get some accuracy with the US869
I stated out low apparently to damn low 93 grain with 300 grain projectile
I'm sure it will pop out once I fire them

 

[Bandit320]

No offense meant, I used to have dents like that after putting new lube on the pad and I thought I’d throw that out. It’ll pop out just fine next time you fire it.

 

[B y r o n]

Dents in the shoulder after sizing is generally caused by excessive lube on the case.