Welcome guest, is this your first visit? Create Account now to join.
  • Login:

Welcome to the NZ Hunting and Shooting Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Delta Alpine


User Tag List

+ Reply to Thread
Page 1 of 3 123 LastLast
Results 1 to 15 of 40
Like Tree12Likes

Thread: Case pressure signs

  1. #1
    Member
    Join Date
    Jun 2012
    Location
    lower hutt
    Posts
    1,048

    Case pressure signs

    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!

  2. #2
    Gone But Not Forgotten Toby's Avatar
    Join Date
    Sep 2012
    Location
    Wouldn't you like to know
    Posts
    11,099
    Is that the first sign of case head separation?
    VIVA LA HOWA

  3. #3
    dog chaser distant stalker's Avatar
    Join Date
    Dec 2011
    Location
    Chch
    Posts
    2,000
    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?

  4. #4
    Member
    Join Date
    Dec 2011
    Location
    NI
    Posts
    11,851
    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.
    Wirehunt and 7mmsaum like this.

  5. #5
    Lovin Facebook for hunters kiwijames's Avatar
    Join Date
    Feb 2012
    Location
    Hawkes Bay
    Posts
    7,094

    Case pressure signs

    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.
    The range of what we think and do is limited by what we fail to notice. And because we fail to notice that we fail to notice, there is little we can do to change; until we notice how failing to notice shapes our thoughts and deeds

  6. #6
    Member
    Join Date
    Jun 2012
    Location
    lower hutt
    Posts
    1,048
    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.




  7. #7
    Terminator Products Kiwi Greg's Avatar
    Join Date
    Dec 2011
    Location
    Nelson
    Posts
    6,499
    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......

  8. #8
    Member
    Join Date
    Dec 2012
    Location
    Wellington
    Posts
    1,786
    As kiwi Greg says cut the case open, plus one other as a comparison, I'd be very interested as well.


    regards

  9. #9
    P38
    P38 is offline
    Member P38's Avatar
    Join Date
    Dec 2011
    Location
    Hastings
    Posts
    5,692
    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

  10. #10
    Ķåîмåî Ćôũńŧřŷ Bushrash's Avatar
    Join Date
    Dec 2011
    Location
    TAURANGA B.O.P
    Posts
    415
    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
    DONT BE A FOOL INDENTIFY YOUR TARGET BEFORE YOU PULL

  11. #11
    Almost literate. veitnamcam's Avatar
    Join Date
    Dec 2011
    Location
    Nelson
    Posts
    24,745

    Re: Case pressure signs

    Quote Originally Posted by Bushrash View Post
    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

    Sent from my GT-S5360T using Tapatalk 2
    "Hunting and fishing" fucking over licenced firearms owners since ages ago.

    308Win One chambering to rule them all.

  12. #12
    Ķåîмåî Ćôũńŧřŷ Bushrash's Avatar
    Join Date
    Dec 2011
    Location
    TAURANGA B.O.P
    Posts
    415
    Yup thanks mate,,, just going down to work to lathe up a bushing to check the headspace ,002" max bump back??
    "
    DONT BE A FOOL INDENTIFY YOUR TARGET BEFORE YOU PULL

  13. #13
    Almost literate. veitnamcam's Avatar
    Join Date
    Dec 2011
    Location
    Nelson
    Posts
    24,745

    Re: Case pressure signs

    That sounds good. I just keep winding down till a case will chamber with just the slightest hint of resistantance on bolt close

    Sent from my GT-S5360T using Tapatalk 2
    "Hunting and fishing" fucking over licenced firearms owners since ages ago.

    308Win One chambering to rule them all.

  14. #14
    Member
    Join Date
    Jun 2012
    Location
    lower hutt
    Posts
    1,048
    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!




  15. #15
    Almost literate. veitnamcam's Avatar
    Join Date
    Dec 2011
    Location
    Nelson
    Posts
    24,745
    If it was hot loads your primer pocket would not hold a primer well before that happened.
    Brass wont last for ever.
    "Hunting and fishing" fucking over licenced firearms owners since ages ago.

    308Win One chambering to rule them all.

 

 

Similar Threads

  1. Wilcats and Pressure
    By Spanners in forum Reloading and Ballistics
    Replies: 112
    Last Post: 28-02-2015, 11:01 AM
  2. Pressure is absolute or ft?
    By Smiddy in forum Reloading and Ballistics
    Replies: 16
    Last Post: 30-01-2013, 07:07 AM
  3. First signs of a good year
    By Bavarian_Hunter in forum Hunting
    Replies: 4
    Last Post: 21-01-2013, 02:23 PM
  4. Energy/pressure relationship
    By distant stalker in forum Reloading and Ballistics
    Replies: 3
    Last Post: 02-09-2012, 08:43 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Welcome to NZ Hunting and Shooting Forums! We see you're new here, or arn't logged in. Create an account, and Login for full access including our FREE BUY and SELL section Register NOW!!