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Hi guys, was shooting at the range and one case extracted with a bright ring on the case about 15mm from the case head. Cases are 6.5x55 on about their 8 or 9th reload with annealed necks 2x sizings ago.
Im going for a stab in the dark that the case has split? Can feel inside with a paper clip a bit of a ridge. I think its fair to say this ones going in the bin!
Is that the first sign of case head separation?
Sounds like that case has done its time. Time to check the others now to see if they aee developing the same.issue. how hot were you running them?
Straighten a paper clip, and put a little right angle on the end. Put it into the mouth of the case and run it down the case wall, and you are likely to feel the concave side of the ring from the inside.
Bin the lot (there goes my good deed for the day).
8-9 loads is OK going I guess for that case.
How often do you FL size? Less work on the brass can extend its useful life.
i think they have been full lengthed twice, others just neck sized. But yeah, its a hot load. I pressed out the primer and that fell out with out much effort.
Heres a pic , as is.
http://i48.photobucket.com/albums/f2...psca970c27.jpg
http://i48.photobucket.com/albums/f2...psd6fc54cb.jpg
That case separation is a fair way away from the head.
But if you can feel a ridge inside thats what it is.
Section that case with a hacksaw & clean it up to have a good look at it, grab another that looks like it's starting to do the same & section that one too, it will give you a better understanding of whats going on, chuck a picture up here as well if you can be bothered.
If all the cases are showing signs bin them now before they cause more serious issues.
If you have the cases standing in a reloading block they will get a shiny mark around them just like that from being moved around & rubbing on the block......
As kiwi Greg says cut the case open, plus one other as a comparison, I'd be very interested as well.
regards
8-9 times Hot reloads is not too bad and in all probability is the cause once you have confirmed it is case head seperation.
Good time to check your headspace too especially if your using "Hot Loads" as this can also contribute to case head seperation.
While headspace issues are less likely, you should never discount anything until you know for sure what the root cause is.
Cheers
Pete
Young fella down the road brought his brass up for cleaning ,,,his has done exactly the same actually cracking ,,,,708 ,,only thing his his is only twice fired rem brass??????not hot loads 42 of 2208 any ideas?? it is a horrible horrible remington 770
Very long chamber and fl sizeing way to short giving lots of headspace ? Or bought off trade me as once fired:DQuote:
Originally Posted by Bushrash
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Yup thanks mate,,, just going down to work to lathe up a bushing to check the headspace ,002" max bump back??
"
That sounds good. I just keep winding down till a case will chamber with just the slightest hint of resistantance on bolt close
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Cut a section out and cleaned it up a little. Was impressed how defined the ridge is. Almost like someone has used a punch to do it.
This is lapua brass by the way. Fired in a Tikka t3 so would hope that its not a headspace problem. But yeah, more than likely hot loads!
http://i48.photobucket.com/albums/f2...psca9ddeb1.jpg
http://i48.photobucket.com/albums/f2...ps49f069dd.jpg
If it was hot loads your primer pocket would not hold a primer well before that happened.
Brass wont last for ever.
I'd also be checking the headspace just to be sure.
Of course.Quote:
Originally Posted by P38
Sorry to hijack the thread ,,,all sorta on same topic
Right have checked head space from a fired case to where they had been sized too and can be improved to where they shoould be,,,,,the head scratcher is on a fired case i can wind the die out lots before i get a tiny bit of bolt resistance ,,,,to the point where it is only sizing three quarters of the way down the neck???and the shell holder is a long way off the seating die ,,,,headspace issue with the gun?? havnt had this before,,,,my tikkas with a tiny bit of bolt resistance to just none is about .001" to .002" bumped back from a fired case
Bushrash, it sounds as if your brass is not ready for a FL resize and you may still get away with just a neck size, you can continue neck sizing until unacceptable pressure is required to close the bolt on a loaded round, high bolt closing pressure wipes lube from the bolt locking lugs inducing galling.
Now to answer your question, once your brass has expanded enough to tighten bolt closure to unacceptable levels use that brass in your quest to find where your die height is sufficient enough to ease bolt closure to a slight 'snug feel' in the last half to quarter of closure.
Your neck bushing die will also allow you to select a neck tension that gives you best accuracy.
You can basicly neck size with a full length die. I can do that a couple of times before it needs actual bumping of the shoulder.
If its been sized down hard and not run hot it will still have some head space after firing.
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All starting to make sense Cheers 7mmsaum so without a neck sizing die ,,,i should be fl sizing the fire formed brass till it just touches the shoulder then wind up a touch?? ,,,as i said with my rifles this isnt an issue ,,,but just as important to have it right for this fella
Haha cheers VC just answered what i just posted:o
That is a little strange.....are they all like that ?....should be easy to see/feel.Quote:
Originally Posted by scoped
Do you have any of the same batch that are unfired or fired less ?
I agree with Greg. It is strange. And I reckon you may be oversizing? You can fix the problem by following the above advice on necksizing. Normally seperation or the onset of it, is evident further back.
How hot is hot, 48 grains of 2209. And yes i cleaned the case so it was easier to see
So what weight is the projectile?,not hot for 100grn but getting up there for 140Quote:
Originally Posted by scoped
yep 140 berger vld hunting
Some good advise and worth looking into.Quote:
Originally Posted by R93
How's it! I've got a tikka m595 .308. Made my first lot of handloads. Lapua brass, 155gr Berger vlds, 2206h powder 45 grains pumping out of barrel at 2845 fps. My brass has same rings down low. Must just be hot loads? Told brass was fired once. 2nd time ring appeared. Be interesting to see how my new brass goes. Ur not alone Scoped
Sure the ring is not just where the die has sized to? The head won't/shouldn't get sized as it shouldn't expand. And that can leave a lineQuote:
Originally Posted by Gutshot
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It could be that you have rings in your chamber? which were done when it was chamberedQuote:
Originally Posted by Gutshot
My Barrett 98B had 2-3 rings in its factory oversized 338 Lapua Magnum chamber :o:XD::wtfsmilie:Quote:
Originally Posted by Terminator
They looked very pretty around the Norma & Lapua brass after it had been though the Redding body die until it split....:oh noes:
I split 3-4 dies until I figured out the problem :o
Then I re-barreled it in 338 Norma mag :cool:
That will teach you for getting a Barrett :)
I think He learned a thing or two since then;)Quote:
Originally Posted by BRADS
Yep but it is cooler than a cool thing & I think the TRGs look like poos ;)Quote:
Originally Posted by BRADS
At least it shoots now :cool:
http://i1004.photobucket.com/albums/...Dec2011010.jpg
That's hot. You really do have the coolest toys in NZ
Yep Im with you on the trg poo thing:)Quote:
Originally Posted by Kiwi Greg
But that Barrett ain't no porn star like this:)Attachment 7096
