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Problem with a rifle scope...

LesWVa
Rifle = Kimber Classic 8400 in .300 Win Mag.
Scope = Leupold Mark4 3.5-10 LR

Both are new or should I say was until today.

The rifle was placed in a vise. The scope was bore sighted.

At 25 yards the rifle shot 2" high and 3" left of center.

Go to adjust the cross hairs and the thing will not move. The adjuster can be turned 10+ times in either direction and the cross hairs will stay put. Fire the rifle and they will then jump but be way off the mark. Both the elevation (up-down) and traverse (left-right) adjusters are doing this. To me it seems as if the scope escaped the factory before the threads were cut into the adjuster screws.

The scope was replaced with a new one free of charge and doubled check at the shop and all is seems well with the new one.

I would just like to hear any ideas as to why it was doing this. For it is the first scope of any brand that I have never been able to adjust.
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Comments

7 comments

Date Votes
  • Kimbercolt
    just because a scope is new does not mean its good.
    quality checks dont always catch the broke ones.
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  • Mk 19
    it sounds likt the retical was not connected to the adjustment crane, it happens sometimes with poor quality control, the new one sould be fine and that is a really good scope your putting on your rifle, so enjoy the one that works.
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  • LesWVa
    Mk 19
    The rifle is not mine. I met the guy at the range and he is suppose to be going on his first ever Elk hunt in Oct.

    I know his BIL fairly well and use to shoot with him a lot. But this guy is kind of odd. He talked to the guide for his hunt on the phone and everything that the guide recommended to him and he went out and bought. If he takes it all the guy will be carrying about 100 lbs of junk when he goes. It is kind of funny. The guide told him to sight his rifle in at 300 yards. So that is what we are going to attempt to do this afternoon. I think the poor ole guy is just to excited to do anything much for himself.[:)]
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  • Highball
    Actually, what most likely happened was that the erector tube was a bit tight when the tech installed it.

    The windage/elevation screws bear directly on the tube and force it in the direction needed, and there is a sort of gimbel arrangement at the other end of the tube, which allows a smooth movement of the tube.
    By being set up too tight, the tube would only move under the jar of recoil.
    Factory defect.
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  • Guns & Glass
    "Turn adjuster 10+ times".....It's the scope. That's way too many. Even if it's one of the following, the internals may now be damaged.

    Other bad influences:
    Wrong base. One maybe off.
    Misaligned base & rings.
    If front base is Dove tail and scope was used to turn the ring in.
    Bad assembly, bad manufacturing, and quality control.

    Wrong base & misaligned base & rings- When tightening uneven, excess pressure is exerted on the outer tube, which pushes in on the nylon inner sleeve or erector cell assembly causing it to bind, or stick. One quick way to test is to turn the Power Ring and "feel' the movement for a good sticking point.

    He's wasting time, and ammo.
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  • LesWVa
    Guns & Glass
    When the adjusters were turned. It did not feel right at all. They felt as if you were turning a striped out bolt. You could have turned them all day long and they would not do anything.

    The scope, bases and rings were installed by the dealer. He also exchanged the scope for another without any hassles at all. The new one works as it should.
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  • He Dog
    You will not find a better consultant on this than Guns and Glass!
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