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Thread: Polygon Barrels?

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  1. #1
    Moderator rsterne's Avatar
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    I have one in .25 cal for my Hayabusa but haven't tried it yet.... From what I've read, they deliver a slightly higher velocity but tend to be more pellet fussy.... IIRC, RandyHub said his was great with JSB Kings.... Mine, unfortunately, is a ways down the list of projects....

    Bob
    Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
    Airsonal: Too many to count!

  2. #2
    Moderator rsterne's Avatar
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    Relatively easy to do if you want a non-PAL gun I would think.... I did a Disco based 9mm Carbine and got 9-10 shots averaging 480 fps (78 gr. EunJins) with a Disco spring and transfer port (although the valve exhaust port was hogged out a bit).... Based on the volume of a QB78 tube, about 6 shots should be possible.... A poly transfer port and a bit of valve work?....

    Bob
    Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
    Airsonal: Too many to count!

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