Split brass

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geth

geth

Well-Known Member
I had these two cases split last night. Sako gamehead factory ammo .243 90gr. Out of 12 shots the bolt was difficult to close on 3 or 4 rounds. I've never had this before. Is it anything to worry about? I'll be giving the rifle a deep clean before I use it next. Rifle is a sako 85.
Also I don't know if I'm being particular but I think the firing pin strike is a little off or is it just me 🤔.
 

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Looks like separate issues.
1. Split necks on new factory is probably improper annealing, difficult to close bolt, case sizing issue
2. Off centre firing pin strike, examine bolt, bolt face & firing pin for irregularities
 
geth said:
I had these two cases split last night. Sako gamehead factory ammo .243 90gr. Out of 12 shots the bolt was difficult to close on 3 or 4 rounds. I've never had this before. Is it anything to worry about? I'll be giving the rifle a deep clean before I use it next. Rifle is a sako 85.
Also I don't know if I'm being particular but I think the firing pin strike is a little off or is it just me 🤔.
Click to expand...
Have you cross referenced previous fired cases from other batches for the firing pin issue?
 
Could be a faulty manufactured batch of brass..
I had this with Lapua brass and contracted them directly.
Lapua asked for the brass back and their report was that the brass was too hard and got by their QC..
 
As mentioned above the case mouth looks very much how a case that’s been crimped with a Lee crimp die looks.

Are you 100% sure these aren’t reloads?
 
Sako6.5x55 said:
Am I seeing things and I’m not sure how it’s possible, it looks like there are lands marks on the end of the split cases?
Click to expand...
That 'ring' mark about 3mm down from the case mouth on both cases is slightly suspicious. Could it be that the cases were too long? I've has similar cracks appear on some well-used brass before but never the accompanying 'ring' mark. Did the cases of the rounds that showed no cracks also have the 'ring'?

Jamsie
 
Jamsie said:
That 'ring' mark about 3mm down from the case mouth on both cases is slightly suspicious. Could it be that the cases were too long? I've has similar cracks appear on some well-used brass before but never the accompanying 'ring' mark. Did the cases of the rounds that showed no cracks also have the 'ring'?

Jamsie
Click to expand...
Just crimping mate.
 
Smellydog said:
Just crimping mate.
Click to expand...
No disrespect, but he did say that specific factory bullet wasn't crimped ... hence my question. I've had brand new Lapua cases that were well over length, so is it not feasible that a few rounds in a specific bullet production run skipped the quality control?

Jamsie
 
Jamsie said:
No disrespect, but he did say that specific factory bullet wasn't crimped ... hence my question. I've had brand new Lapua cases that were well over length, so is it not feasible that a few rounds in a specific bullet production run skipped the quality control?

Jamsie
Click to expand...
They wouldn't chamber. We are looking at fired cases. They was crimped. You can see it, irrespective.
 
Jamsie said:
No disrespect, but he did say that specific factory bullet wasn't crimped ... hence my question. I've had brand new Lapua cases that were well over length, so is it not feasible that a few rounds in a specific bullet production run skipped the quality control?

Jamsie
Click to expand...
What do you mean by rounds in a bullet production?
 
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