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Thread: Crosman MK I HPA Project

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  1. #1
    Senior Member SeanMP's Avatar
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    Dude I'm drooling that thing is so wicked.

    You have done a great job restoring(refurbishing) that MK.

    Your numbers look great. Nice and stable after the first few shots to loosen things up. Looks like your gonna have a great target pistol there.
    Sean

  2. #2
    Moderator rsterne's Avatar
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    The "bent barrel" look is called, interestingly enough "barrel distortion" and occurs to some degree in all wide angle lenses.... While items in the center of the frame are straight, straight lines along the edges end up curved at the focal plane of the lense.... If you take a photo of a rectangle, it ends up looking like a barrel.... hence the name.... The extreme case is with a "fish-eye" (180 degree) lense where the edges of the image are bent so much they become a circle....

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

  3. #3
    Moderator rsterne's Avatar
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    Since the velocity never increased below the setpoint, the hammer hit is not too light.... If it drops off immediately at the setpoint it may, however, be heavier than needed to achieve the velocity you can at that pressure.... The fact that clipping 1/4-1/2 turn off actually reduced the velocity makes this unlikely, however.... If the hammer hit is too heavy, all you are doing is losing shots.... so if you are happy with the shot count I'd leave it alone.... Also, you have the velocity right where you want it.... Well Done !!!

    When you get a full 3000 psi fill, you might want to check the velocities again as you might be a whisker over due to regulator "creep"...

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

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