accuracy problems with new barrel

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by 14cm, Jan 14, 2010.

  1. 14cm

    14cm Active Member

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    284 winchester, 1-9.5 kreiger tube, 162 gr bullet, .010 from touching.

    shot three rounds in 1.5" group, went in loaded 3 more, shot them. the second 3 cut the first 3.if it was bedding i do not think they would exactly cut the first 3.

    58gr 4831 sc

    interarms mauser action, brll carlson stock with aluminum bedding insert.
     
  2. Michael Eichele

    Michael Eichele Well-Known Member

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    Have you tried any other powder charge weights or powders altogether? Sounds like you may need to do a ladder test to find your barrel's sweet spot.
     

  3. elkaholic

    elkaholic Well-Known Member

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    Agree with Michael. One load test is far from determining whether you have ANY problems or not. Sometimes bullet seating depth alone will make a huge difference, especially if you are shooting vld's. Good luck........Rich
     
  4. 14cm

    14cm Active Member

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    i have tried several loads 120gr 140gr and now onto 160. have tried 4350 and 4831. i just found it odd it printed 2 perfect 3 shot groups. number 1 and 4 cut, 2 and 5 cut and 3 n 6 cut. these groups were 10 min apart and mesured 1.5". i am about to give up and drive this gun into the ground for a tamato stake. or trade it for a 30-30. probably shoot better ugggggggggg
     
  5. elkaholic

    elkaholic Well-Known Member

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    OK, I think I see what you are saying now! It sounds very much like a scope problem. I would mount another scope and see what it does. First, you might want to check and see if everything is tight on the scope and mounts and also your bedding screws.....Rich
     
  6. RockZ

    RockZ Well-Known Member

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    as long as your rifle and bedding and scope setup are sound

    If you haven't done a seating depth trial
    that's the first thing I'd do
    seating depth can greatly affect grouping and is often the
    cure for double grouping
     
  7. dirtball

    dirtball Well-Known Member

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    If this group is triangular in shape, I would play with seating depth before I tried different powders,etc.
    Dave
     
  8. 7 loader

    7 loader Well-Known Member

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    For sure try the seating depth. most vld's need to be seated on the lands. Also check and make sure that it is all concentric, vlds are fussy like that. And thats if. You are using a vld. If not, having a gun smith check th action is a start.lightbulb
     
  9. 14cm

    14cm Active Member

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    i will try jamming it and see what i get. i am going to bed the scope base then try again. I am about to give up. i have a tc icon with factory 30 tc ammo that will shoot 1/2 all day. i do not need the frustration this gun is providing me.

    lol,,,, i hate guns that wont shoot. it seems that some will shoot no matter what and then ones like this.
     
  10. woods

    woods Well-Known Member

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    Your twist may be a little slow for 162 gr bullets

    Welcome to Shilen Rifles, Inc.

    unless you are shooting the Bergers which have a lot less bearing surface.

    .010" is too close. Any variance in seating depth will cause an accuracy problem. Move out to .025" with a 140 gr Accubond.

    JMHO
     
  11. elkaholic

    elkaholic Well-Known Member

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    Several people have mentioned the seating depth already and they are correct. When using vld's they most likely need to be very near or even into the lands. My 6.5 Sherman likes the 140 bergers .020" into the lands. Because of the sharp angle of the ogive, they tend not to "stick" in the barrel as easy when extracting a loaded round. One word of caution; when doing this work up your load carefully as it sometimes can raise pressures, especially with larger bores.
    Good luck....Rich