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Ammo consistancy from a progressive press

Discussion in 'Handloading and Reloading' started by bigjim, Sep 5, 2004.

  1. bigjim

    bigjim Member

    Dec 28, 2002
    Progressive results

    9mm Mixed brass, Win231 powder (4.2 gr) 124 grn Montana gold bullet

    9 shot string from a cold gun.

    HIGH 1005 fps
    low 984.fps

    Extreme Spread of 20 FPS
    Standard Deviation of 6.6

    45 acp load

    VERY Well used Mixed brass Win 231, 230 grain truncated cone flat point bullet.

    13 shot string

    High 813 FPS
    low 777 FPS

    Standard Deviation of 10.7
    Extreme spread of 36 fps
    Average 796 FPS

    There results are every bit as good as I get with mixed brass loads on a single stage hand weighing all the charges.

    I am very pleased with my Dillons.
  2. stans

    stans Senior Member

    Dec 27, 2002
    central Virginia
    Consistancy comes from using quality equipment and using it the exact same way every single time. If one pull of the press handle is rapid and the next is painfully slow, consistancy will suffer. Unless you are loading for precision rifle target shooting like bench rest, the ammo from a progressive press will be just as good as ammo off a single stage press.
  3. Valkman

    Valkman Senior Member

    Jul 31, 2003
    North Las Vegas, NV
    When I tested a bunch of .45acp loads throught the Chrony WWB was the best and UMC was by far the worst. My reloads from a 550B matched the numbers of the Win. White Box almost exactly in fps and SD, with 5.6gr of W231 under a 230gr Bear Creek RN bullet.

    This is why compettion shooters use Dillon machines almost exclusively.

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