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Verticle adjustment.

Discussion in 'General Gun Discussions' started by Jurist, Oct 16, 2013.

  1. Jurist

    Jurist Well-Known Member

    Can't get enough elevation from my scope,I have shimmed the rear scope ring with three aluminum shims from a soda can,still short on elevation.I was wondering if it would be a good idea to swap the rear scope ring for the next highest ring,could that damage the scope?.
  2. Blackrock

    Blackrock Well-Known Member

    Don't know for sure what you are trying to do but a little info on your present setup would help.
  3. highorder

    highorder Well-Known Member

    Which rifle, scope, bases, and rings are you using?

    It's either all assembled wrong, your scope is broken, or you're trying to zero a .22lr at 600 yards.
  4. Akita1

    Akita1 Well-Known Member

    Need more info brother - I have never had that problem except when I tried mounting on top of an AK (instead of the side mount), which of course moves every time you shoot it.

    What's the gun, caliber, scope, rings, etc.?
  5. MrCleanOK

    MrCleanOK Well-Known Member

    As others have said, we need more information about your equipment to be able to help you with your problem. But, to answer your question, no, you can not mix rings of two different heights. Rings need to be concentric or they will torque and crush the scope body. Rings of the same height are concentric (or are at least supposed to be), rings of different heights are not concentric.
  6. Jurist

    Jurist Well-Known Member

    scope adjustment

    More input,
    Scope:Leupold VX-1,3X9X40MM
    Weaver one piece Grand Slam base
    Leupold standard dovetail rings low
    Gun: Marlin 1894c 357 mag

    Gun prints 6"low of point of aim at 50yds,can only manage to bring it up by 3" only after making three full turns on the elevation turret,and can't make any more adjustment.
  7. Akita1

    Akita1 Well-Known Member

    Thanks for the info Jurist - no immediate reason for the problem you're having on the surface if it. Please don't take offense at this, but any chance the shims are screwing you up or the scope rings are loose? To Mr. Clean's point, they need to be level/concentric. I use a few Leupolds and have never had a problem with them, but admittedly have never used one with a pistol cartridge. Having said that, it's a heavy bullet too and turning that elevation knob to the end is WAY past where you would expect to be at 50 yards.
  8. Jurist

    Jurist Well-Known Member

    scope adjustment

    No offense taken,I too thought the base may have gotten loose at one time.I previously had a weaver one piece base,with grand slam lever lock rings,same problem existed where I could gain elevation on the scope.With shims removed,and using the one piece weaver steel base with low dovetail rings,i'll try again.I have also zeroed the reticle to mechanical zero.Wish me luck at the range once again this Friday.
  9. Jurist

    Jurist Well-Known Member

    scope adjustment

    No offense taken.
  10. jaytex1969

    jaytex1969 Well-Known Member

    Vertical adjustment....

    That's the one that keeps the TV screen from rolling...

    Some of you kids have no idea what I'm talking about...
  11. Akita1

    Akita1 Well-Known Member

    Wow brother - truly a conundrum. Let us all know how it goes Friday.
  12. Akita1

    Akita1 Well-Known Member

    now THAT's funny
  13. 556by45guy

    556by45guy Well-Known Member

    Assuming the base is installed correctly. Swap the rings. Front to back and back to front. If that doesn't gain you anything try turning them 180deg. Last is to leave them 180deg and swap front to back again.

    If none of the above work you could try to get a 10/20/30MOA scope base or maybe there is something wrong with your scope or gun. Be a shame if the barrel bands are at fault.
  14. Outlaw Man

    Outlaw Man Well-Known Member

    Honestly, that was my first thought - that it's a 10 or 20 MOA base turned backwards.

    I don't know if you can get a Grand Slam base from Weaver like that, though.
  15. Haxby

    Haxby Well-Known Member

    You can't swap rings front to back with that base.
    I doubt that anybody makes a tapered base for a Marlin lever action.

    1. You have a 1-piece steel base. If you have to shim, shim under the base, to keep the rings aligned. You could bed the base to the receiver with epoxy once you get the angle right.
    2. Check out Burris Universal Signature rings. They should work with the Weaver GS base.
  16. another pake

    another pake Well-Known Member

    We had an 8 inch Philco in a huge cabinet.

    The vertical hold knob got far more workout than the channel selector. There were only 2 or 3 stations broadcasting then, but the picture rolled like crazy!
  17. taliv

    taliv Moderator

    man, that brings back memories

    to the OP... do a little sanity check. just eyeball down the rail and see if it appears to be parallel with the bore, or converging or diverging? if you have something really long and straight and inflexible like a sturdy yardstick, or a laser or something, set it on the bottom halves of the rings and see if it is closer together or farther apart at the muzzle
  18. Al Thompson

    Al Thompson Moderator Staff Member

    Agree with Taliv. I think there's some inherent problem that not visible. :(

    If you have another scope, try it, just to eliminate the original as a trouble source.
  19. 556by45guy

    556by45guy Well-Known Member

    This might be a silly question, but can you get on paper at 50yds using your iron sights?
  20. Caliper_Mi

    Caliper_Mi Well-Known Member

    I'm thinking something is mechanicaly wrong here. 6" low @ 50yd = 12moa. If the scope has 1/4 moa clicks as most do, you should only need 48 clicks to zero it. Pretty sure that three full turns would be more than 48 clicks.

    Do you have another scope to try on the rifle?

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