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  1. #1
    Senior Member Mark-II's Avatar
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    Is my scope bad? Or is the rifle?

    I swear I posted about this the other day, but the thread is gone....

    Short redux: BCL102. Hundreds of rounds down range and not one acceptable load.

    Scope is clear when I look through it with the gun empty. I drop the bolt into battery and it gets just a slight bit out of focus, like somewhat dirty glass or aging eyes that can't quite keep in focus

    I was actually blaming my vision until I had to admit that this is 100% repeatable. The scope remains just very slightly fuzzed until I'm finished with my string, then It will clear.

    It's not heat shimmer. Can't see how it's vibration because I can't damp it with my hand on the tube.


    I'm annoyed enough that I'm about ready to put the rifle, with its so called match barrel, up for sale and get a nice bolt gun that will actually shoot groups instead.

    But I'd like to know whether this vortex diamondback, bought slightly used, is a problem or not.


    FWIW I was also shooting a 5.56 AR with a bushnell scope and had no issues with fuzz or getting bullets to go where I pointed it
    Schrödinger's Gat - The logical paradox which posits that a firearm, stored safe in the home, is at the same time On The Streets

  2. #2
    Resident Combine Pilot JustBen's Avatar
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    Have you tried a different optic?

  3. #3
    Super Moderator Rory McCanuck's Avatar
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    Easiest thing is try a different scope on there.
    Doesn't have to be a great scope, just something that will work for a couple of groups to troubleshoot.
    A little less drastic than throwing the gun away
    Don't blame me, I didn't vote for that clown. Oct 20, '15

  4. #4
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    what can change when you put the bolt in battery ? could the rail shift ?

  5. #5
    The Gunsmithing Moderator blacksmithden's Avatar
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    I make no secret of the fact that Im no Vortex fan after my experience with a Viper PST that had a looser than hell reticle. Like the other guys said....switch it out and see if thats it before you waste anymore time and ammo on it.
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  6. #6
    Resident Combine Pilot JustBen's Avatar
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    Quote Originally Posted by Stew View Post
    what can change when you put the bolt in battery ? could the rail shift ?
    What are you running for a mounting system? If something is binding just so, maybe a mount like a Burris PEPR would be better?

  7. #7
    Senior Member Mark-II's Avatar
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    Vortex cantilever mount.

    I could do up another hundred test loads with a different scope and mount.

    It just feels like insanity..
    Schrödinger's Gat - The logical paradox which posits that a firearm, stored safe in the home, is at the same time On The Streets

  8. #8
    Resident Combine Pilot JustBen's Avatar
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    Quote Originally Posted by Mark-II View Post
    Vortex cantilever mount.

    I could do up another hundred test loads with a different scope and mount.

    It just feels like insanity..
    Hmm, I’d think a cantilever mount would be fine...

    Is this that Diamondback that I sold you? I know that scope was good.

    A cheaper option is to move the scope to a different rifle that you know shoots well.

  9. The Following User Liked This Post By JustBen

    Rory McCanuck (06-17-2018)

  10. #9
    Senior Member
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    The scope remaining just very slightly fuzzed isn't going to be caused by the rifle.
    "...not one acceptable load..." The scope won't fix that either.
    No mention anywhere of Match grade barrels on BCL102's either. No mention of the triggers used. That and the bullet you're using matters. A BCL102 isn't a match grade rifle by a very long, um, shot. However, any rifle will shoot at least a bit better with match grade bullets that are meticulously loaded. That means no powder throwers.

  11. #10
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    "Scope is clear when I look through it with the gun empty. I drop the bolt into battery and it gets just a slight bit out of focus"
    Justice, this is the problem OP stated

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