Christensen Rifle....#2?

Discussion in 'Long Range Hunting & Shooting' started by shooters, Jul 21, 2018.

  1. shooters

    shooters Well-Known Member

    Messages:
    252
    Joined:
    Feb 28, 2007
    So. I had opened a thread a few weeks ago discussing issues I had with my 28 Nosler in A Christensen Ridgeline. Showed what appeared to be pressure issues...headspace maybe? Needless to say, we sent it back to Christensen. There’s no way that rifle was tested before being sent out the door. No matter what ammunition was fired through it, factory or hand loaded, you had to beat the bolt handle up. Anyhow, I never did find out what the issue was. So they sent me out another rifle. This time instead of the 28, I chose to go back to my favorite caliber, The 300 RUM.
    So now onto my next concern. Taking an empty (no bullet) full sized Norma brass and feeding it, feels ok and bolt seems to close smooth. No, loading up a 190 Accubond LR at Mag length (3.800 I believe) no way bolt handle would come close to closing. Working my way down every few thousandth, around the 3.680 the bolt would finally close but it felt very gritty and rough...like it was digging into the lands. So long story short, I’m all the way down to 3.540 and it still feels the same. That is seated ridiculously deep. I’ve loaded 6 rounds the same and all feel terrible closing the bolt. I don’t have any factory ammo to try. Can someone maybe point me in the right direction? What am I doing wrong here or what to try??
     
  2. lancetkenyon

    lancetkenyon Well-Known Member

    Messages:
    1,022
    Joined:
    Jun 3, 2013
    Great.....

    I just had a buddy buy two CA Ridgelines....in 28 Nosler and .300RUM! And he wants me to work up loads for him.....
     
    brentc likes this.
  3. Canhunter35

    Canhunter35 Well-Known Member

    Messages:
    1,430
    Joined:
    Jun 13, 2017
    Don’t shoot it, send it back while it still unfired and get them to check it
    I know it’s painful but it’s not your fault there’s something wrong with the rifle
     
  4. shooters

    shooters Well-Known Member

    Messages:
    252
    Joined:
    Feb 28, 2007
    And....cases are all trimmed to 2.840. Well below the max of 2.850. Just don’t get it with these rifles.
     
  5. The Oregonian

    The Oregonian Well-Known Member

    Messages:
    788
    Joined:
    Jul 20, 2012
    I would also send them a dummy round with no powder or primer, showing you are well below the Nosler recommended COAL of 3.60”. This will let them see the issue, rather than them loading some bullet that may chamber fine. Otherwise they may tell you it was something with your ammo - sending the dummy will prevent that.
     
    Canhunter35 and shooters like this.
  6. LongBomber

    LongBomber Well-Known Member

    Messages:
    343
    Joined:
    Dec 27, 2008
    Before you ship it back-
    Were the lands actually digging in at 3.68"?
    I would use a sharpie and paint up the case and bullet and chamber it to see where the issue is.
     
  7. shooters

    shooters Well-Known Member

    Messages:
    252
    Joined:
    Feb 28, 2007
    I’m going too. For all I know, it’s something I’m doing or with my brass. I’m not pointing fingers at the rifle just yet. Just needed some opinions or thoughts. I’m gonna run each new Norma brass through the sizer die before I try again. Could b a brass issue too. I’ll keep at it
     
  8. L.Sherm

    L.Sherm Well-Known Member

    Messages:
    366
    Joined:
    Jul 26, 2017
    Try and chamber a resized piece of brass without any primer or bullet and see what happens.
     
  9. shooters

    shooters Well-Known Member

    Messages:
    252
    Joined:
    Feb 28, 2007
    I did that. Felt perfectly fine.
     
  10. L.Sherm

    L.Sherm Well-Known Member

    Messages:
    366
    Joined:
    Jul 26, 2017
    Sorry I just reread your post and saw that you did that already,
     
  11. L.Sherm

    L.Sherm Well-Known Member

    Messages:
    366
    Joined:
    Jul 26, 2017
    I would call Christensen and ask them what they thought your O.A.L should be with the bullet your using they should have some idea that would be fairly close.
     
    shooters likes this.
  12. 26Reload

    26Reload Well-Known Member

    Messages:
    661
    Joined:
    Dec 25, 2016
    This sounds simular to a situation I was dealing with a while ago....
    Had a shilen 260 barrel rechambered to 65284....gritty feeling while closing bolt....did the black marker trick and found the case was being scratched up near the neck shoulder junction...after i did the marker test I looked back at previous cases and it was very obvious...i just misread the problem...thought it was the neck being squeezed....
    This was a rechamber with a rental tool...how clean the tool was, don't know...but apparently it could have been cleaner....
    I took a brass brush attached on my drill and ran it in there for awhile(couple minutes) and it made a big difference...so i ran it some more and no more problems.....so then i finished it up with JB borepaste and a fiber brush with drill.....then cleaned it really well....doesnt have any problem now..other than i have little time to shoot it.....
    Not saying this is your delimma...but....
    Myself...NEW RIFLE...send it back with FL sized brass and a fired brass from another and make sure both work correctly...maybe it was a well used reamer on both rifles....worn out reamer.....
    Totally ridiculous problem to have with new rifle....
     
    shooters likes this.
  13. rfurman24

    rfurman24 Well-Known Member

    Messages:
    1,463
    Joined:
    Aug 29, 2010
    I think we asked this about your 28 but have you purchased a OAL gauge from Hornady? It is not safe to be reloading without knowing your throat measurements. Christensen uses SAAMI specs as was mentioned in your other thread. SAAMI throats are often shorter than some reloaders desire to get maximum performance but that is what every production rifle manufacturer to my knowledge uses. I would not have any suggestions without first knowing your throat's measurements. I do not own a RUM so I would not know what to expect and I do not shoot Nosler bullets but I do know they typically have a long bearing surface which would case the bullet to be seated deeper than a bullet with a shorter bearing surface.
     
    shooters likes this.
  14. shooters

    shooters Well-Known Member

    Messages:
    252
    Joined:
    Feb 28, 2007

    Just noticed this.....and I think you got it!