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Thread: 200yd Blackfeather range report

  1. #1
    CGN Regular TonyBen's Avatar
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    200yd Blackfeather range report

    I took the BF rifle out last week at 200 and the results were very disappointing! I had a very bad case of vertical stringing! Rather than post it and let speculation run rampant, I decided to solve the problem first, then post it. Here's what I was seeing last week...



    This led me to investigate possible issues. I looked over the stock with a very critical eye. I found that the heel was floating over the stock by about 0.012"! I checked the fit of the receiver and the legs as well as the front of the receiver was in full contact. No amount of hammering the receiver with a mallet was going to fix this...





    I also noticed that my scope had "skid marks" from where the scope had walked back about 2mm over the last few months of firing. I reseated the scope and hit the range again to see if the scope or the floating heel was the culprit. The vertical stringing was still there. I ended up shimming the heel with muffler heat barrier tape and trimming them to fit. Each layer was 0.003" thick so I laid four layers down.









    That 5 minutes of shimming tightened the groups right up and I ended up shooting 7 consecutive 5-shot groups at 200 yards with a low of 1.290" and a high of 2.700" with an average group size of 1.988" at 200 which would be a 100yd average of 0.994".









    Life is good! And I get a Leupold scope later this week.

    To M14.CA's credit, it is nearly impossible to design a stock that will fit all commercial receivers. I don't know if the issue is my receiver or the stock. If there's a gap, I have a fix and it's cheap and quick.

    Tony.

  2. #2
    HELP! I sold my soul to the internet Brutus's Avatar
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    M14ish threads are pretty common here on CGN.
    Truth-The new hate speech. By George Orwell.

  3. #3
    I have no life jennis's Avatar
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    The overhead concrete berm is a nice touch @ 25 meters
    " The blood dimmed tide is loosed and everywhere the ceremony of innoncence is drowned; the best lack all conviction while the worst are full of passionate intensity..... "

    - William Butler Yeats

  4. #4
    HELP! I sold my soul to the internet DOOK's Avatar
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    I would be concerned about ricoches from that abomination.
    Nice rifle though.

  5. #5
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    Just checked, no issue like that on my Socom 18, flat and tight all the way.


    Last edited by fritzhanzel; 10-13-2014 at 08:58 PM.

  6. #6
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    Good report, thanks. Very ingenious and effective use of the muffler tape to shim the receiver.

    I suppose if the stock needs to fit receivers of various dimensions it is better for the stock to be "undersize" and allow for shimming than "oversize" which would require trimming.

    The M1A/M14 rifles already have an established tradition of shimming for improved accuracy at the front, there is nothing wrong with something similar at the back.

    Snapshot

  7. #7
    CGN Regular sksscrew's Avatar
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    I'd be pretty friggin happy with those results. I love my Blackfeather but I can't say I'm a great marksman to begin with. Nicely done and glad to see you resolved the issue on your own. That's half the fun of tinkering with these "toys". Enjoy!

  8. #8
    Uber Super GunNutz xdmer's Avatar
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    Thanks for the report, and if we run into the issue, you've given us an easy fix!
    Travis Kay
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    CCFR, CSSA, NRA member, are you? In the greater Vancouver area? Drop me a PM

  9. #9
    I have no life
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    muffler tape .... well, thats new to me ! and clear evidence it works like a charm

    thanks, great post !

  10. #10
    CGN Regular TonyBen's Avatar
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    FYI-

    The tape I used was "Reflectix" brand reflective insulation tape. Not sure if it's the same as muffler tape.

    Tony.

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