possible causes of horizontal stringing

Discussion in 'Gun Project Questions & Gunsmithing' started by Willoughby, Nov 6, 2019.

  1. Willoughby

    Willoughby Silver $$ Contributor

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    I bought my then young sons identical R700 SS Mtn rifles in 3006 with pencil barrels and Leopould vxiii scopes in 1988? ish
    they both shot well for all these years , and one still does print 3 shot moa groups -good enough for hunting , the other one recently started horizontal stinging, first cold shot may hit a inch or so from center , next 2 shots will be 2 inches left and 4 inches left of 1st shot , but perfect horizontal line , Ive checked scope mounts, and bedding all seems to be in order, I bedded both rifles some years ago with devcon and steel pillars - Im out of ideas . Im thinking swapping scopes , but Ive never had a Leopould fail, any ideas appreciated , thanks in advance
     
  2. JEFFPPC

    JEFFPPC Silver $$ Contributor

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    Very easy, switch the scopes gun to gun after checking bases are still tight. I have often found bases loose when checking similar problems for people. And any brand scope can and do fail.
     
    Last edited: Nov 7, 2019
  3. SSL

    SSL Gold $$ Contributor

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    Is this from a clean barrel each time? If so, what happens with subsequent shots as the barrel fouls? If the group settles down, obviously the barrel requires a certain amount of fouling to group. I had a Weatherby .257 Magnum that did exactly that. It had to have at least 5 shots fired before it would group...and it too had one of those buggy whip barrels.

    On the other hand, I also had the same thing happen on a different rifle and it turned out to be a weak tensioning spring (for want of a more technical description) on the horizontal adjustment. Each shot jarred it just enough to move the crosshair an additional 3 clicks right (group left). Scope had previously been flawless. As to scopes failing; it isn't a matter of if, it's a matter of when. Some just take longer to fail.

    Good luck and keep us posted as to what you find.
     
  4. RWO

    RWO

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    It's LEUPOLD! dammit. NOT "Leopould"
     
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  5. garandman

    garandman Bolt Gun Bodacious Gold $$ Contributor

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    I've given up on the butchery being done to Lou O. Pold's name. :)
     
  6. JEFFPPC

    JEFFPPC Silver $$ Contributor

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    Dont forget Knight Force scopes, lol.
     
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  7. garandman

    garandman Bolt Gun Bodacious Gold $$ Contributor

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    Your recommendation to simply switch scopes (put the good scope on the offending rifle) and check the rings and bases was a tiny bit of genius. :)

    My experiences with pencil barrels have never been good. They heat up fast and walk long distances.... for me, anyway.
     
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  8. carlsbad

    carlsbad Lions don't lose sleep over the opinions of sheep. Gold $$ Contributor

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    Moving as it heats up could be differential heating, especially on a light barrel. I'd make sure I have good clearance around the barrel, and that the bedding is still seated well, and the action screws are tight. --Jerry
     
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  9. SPJ

    SPJ Gold $$ Contributor

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    Anyway I think your barrel’s bent
     
  10. carlsbad

    carlsbad Lions don't lose sleep over the opinions of sheep. Gold $$ Contributor

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    Yes, a bent barrel can move as it heats up.
     
  11. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    Forester
     
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  12. Willoughby

    Willoughby Silver $$ Contributor

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    my apologies fine sir but- my scope boxes from 88 are all in the attic, I think...
     
  13. Alex Wheeler

    Alex Wheeler Gold $$ Contributor

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    Rotate the scope in the rings 90 degrees and see if it starts vertical stringing.
     
  14. Shawnba67

    Shawnba67 Silver $$ Contributor

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    Genius!
     
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  15. BIG D

    BIG D Gold $$ Contributor

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    Replace firing pin spring
     
  16. mike a

    mike a 6BR Rocks Gold $$ Contributor

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    How it on its side. Gangster style.
     

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