Is this case head separation?
- Thread starter Axis II
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Check them on the inside.
https://www.thehighroad.org/index.php?threads/incipient-case-head-separation.734058/
Might just be a sizing or stretch mark.
That's all this is.
https://www.thehighroad.org/index.php?threads/incipient-case-head-separation.734058/
Might just be a sizing or stretch mark.
That's all this is.
sparkyv
Member
Can't really see well, ohihunter2014. Pics of cartridges are blurry, but the load data is focused well. 
mrawesome22-250
Member
Are you still doing the one full turn crimp?
Could be cases starting to buckle if you are.
Could be cases starting to buckle if you are.
Sorry I keep forgetting about the paper clip test. I loaded, crimped and put everything away for the night and noticed the rings.
Nope I’m doing 3 turns this time
I actually noticed the last one before crimping. 1/8 turn for crimp.
Sorry the lights are terrible. I have a ceiling light that’s about 8ft behind me and an old adjustable desk light mounted on top of the bench and LED on the press.Can't really see well, ohihunter2014. Pics of cartridges are blurry, but the load data is focused well.
mrawesome22-250
Member
From your first blurry photo it looks like the ring is well above the case web (which would indicate an incipient seperation).
If you put a magnifier on it can you see any cracking?
If you put a magnifier on it can you see any cracking?
frankmako
Member
i got some starline 357 mag brass that breaks in the same place. i will lose one or two about every other match. not hot loads, just the way it goes. case head seperation is closer to the end.
Pull the worst looking one and check the inside. If you are indeed getting case head separations with a straight walled caliber that headspaces on the rim you are really pushing pressure, or your action is flexing a lot, or both.
buck460XVR
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Levers, because of the way the bolt locks up at the rear do tend to flex and can cause case head separation in straight wall cases when loads are high and brass used too many times for high pressure loads. But I agree with Walkalong, the only way to know is to do the paper clip test. BTW......Really hard to get a separated case from a lever chamber.
These have been loaded about 6 times for a Marlin 1895. In the beginning of their life it was high end trap door and low end Marlin data until the last 2-3 loading's of mid range Hodgdon data. I will pull the worst looking one tonight and see if there is a divot.
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