Start of case separation??????

[Chesterrose79]

I honestly think they're scratched from my sizing die. Every one has the same marks and it doesn't extend onto the shoulder towards the neck. They're all same length and pattern.

Scratch that. There are scratches and cracks. Gonna chuck these out anyway to be safe!!!

 

[rammac]

So I have a 6.5 creemoor and I've been reloading with lapua brass. So far with this brass I've done load development and have had some pressure signs. I'm on my third firing with these. Last firing I seen these rings and shot them anyway. Nothing happened and I am happy with the results. My question is. Am I sitting on a ticking time bomb? Should I scrap these? I checked the inside with a paper lip and felt nothing.

What powder and bullet are you using?

 

[Chesterrose79]

What powder and bullet are you using?

H4350 39gr
Hornady 147gr eld-x

 

[26Reload]

Gee...you mean this line.....yes..they are ready to separate...
I lost 34 at one time...only one separation...no marks beforehand.....running my feeler rod inside I could feel the ring all around the brass....
Good choice to be rid of the problem...
So you were either ahooting really hot loads...or brass previously shot in another rifle....

 

[rammac]

H4350 39gr
Hornady 147gr eld-x

I'd try a slightly slower powder, maybe H414 or Norma URP. You should use about the same amount of powder and get the same performance with the H414 but the Norma URP will probably take a grain or two higher load to optimize it.

 

[243winxb]

I seen these rings

Are you using a comparator to adjust your full length sizing die?

Pushing the shoulder back a lot, when full length sizing, will cause brass to stretch on firing.

The head to datum measurement, while sizing, should be checked every loading.

Or make a home made comparator.https://www.longrangehunting.com/th...ulder-bump-without-rcbs-precision-mic.241959/

 

[Chesterrose79]

Are you using a comparator to adjust your full length sizing die?

Pushing the shoulder back a lot, when full length sizing, will cause brass to stretch on firing.

The head to datum measurement, while sizing, should be checked every loading.

Or make a home made comparator.https://www.longrangehunting.com/th...ulder-bump-without-rcbs-precision-mic.241959/

View attachment 204417

I am. The Hornady comparator. Bumping shoulder back .003

 

[browndcm]

Scratch that. There are scratches and cracks. Gonna chuck these out anyway to be safe!!!

Empty the case put a plug in it with a hole, put soapy water on the outside of the case and blow in it If you see bubbles it is a crack
Wont tell you if it is about to crack
Good luck

 

[hunter0528]

So I have a 6.5 creemoor and I've been reloading with lapua brass. So far with this brass I've done load development and have had some pressure signs. I'm on my third firing with these. Last firing I seen these rings and shot them anyway. Nothing happened and I am happy with the results. My question is. Am I sitting on a ticking time bomb? Should I scrap these? I checked the inside with a paper lip and felt nothing.

Do you have one of the cameras that you can feed into the case to get a physical look at the inside of the case?

 

[hunter0528]

Gee...you mean this line.....yes..they are ready to separate...
I lost 34 at one time...only one separation...no marks beforehand.....running my feeler rod inside I could feel the ring all around the brass....
Good choice to be rid of the problem...
So you were either ahooting really hot loads...or brass previously shot in another rifle....View attachment 204357

Why the seperation so high on the case? I've had it happen on my 7mm RM but much closer to the case head.

 

[Chesterrose79]

Do you have one of the cameras that you can feed into the case to get a physical look at the inside of the case?

No I don't. I should get one tho

 

[26Reload]

Why the seperation so high on the case? I've had it happen on my 7mm RM but much closer to the case head.

It is where it is...no idea in my head...but it's the same on all the 34 brass....now 35...
Rather it not happen at all....if I remember I was on 5th firing of 100 cases...
But I have backup brass now...

 

[ScottB338]

Are you using a comparator to adjust your full length sizing die?

Pushing the shoulder back a lot, when full length sizing, will cause brass to stretch on firing.

The head to datum measurement, while sizing, should be checked every loading.

Or make a home made comparator.https://www.longrangehunting.com/th...ulder-bump-without-rcbs-precision-mic.241959/

View attachment 204417

I can be a cheapskate but...This is a great idea!